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AshleyN Posted
⭐️⭐️⭐️⭐️⭐️ 5-Star Review: Game-Changer for Online Security! I can’t say enough great things about the YubiKey! As someone who has dealt with cybersecurity concerns in the past, this little device has brought me so much peace of mind. It’s incredibly easy to set up, and once it’s linked to your accounts, logging in becomes both faster and more secure. What I love most is that it offers physical two-factor authentication, meaning even if someone had my password, they still couldn’t access my account without my YubiKey. It’s a powerful layer of protection against hackers, phishing, and identity theft. It works seamlessly with my Google and Apple accounts, social media, email, and even some work-related systems. The build quality is excellent, and it’s small enough to fit on a keychain—so I always have it with me. If you’re serious about protecting your digital life, I highly recommend investing in a YubiKey. It’s one of the best decisions I’ve made for my online safety!
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
Moee Posted
This yubi key is a must have item super easy right out of the box its plug and play the security is superb good for your apple accounts online ,pc and so many other services or devices i reccomend to all who are looking to put there mind at ease and not worry about breaking the bank as this item is very well priced for its functionality and security
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified OnePack - Black
Posted
Hi Moee, glad that the key has been working well for you! Great to hear that it has been helpful and thank you for keeping the internet a safer place!
Verex Posted
I’d say this is going to be a pretty straightforward review: It’s a bit pricey, but you get what you pay for. I’ve recently decided to improve my personal cybersecurity. I’ve already set this up with my password manager (won’t disclose which one, but you can count on this to work with anything that supports FIDO-based 2FA). Setup was as easy as it gets, and it’s compatible with all my devices (all have either USB-C and/or NFC). I particularly like the NFC capability because it’s less wear and tear on any of my devices’ ports. Build quality is solid, and I expect this product to be highly durable, acting as a portable “key”. To sum it up: if you’re looking for a great physical “key”, NFC is a must-have, and USB-C is your choice, then this is the product for you.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
AdamA Posted
The product works flawlessly. It simply isn’t a beginner level device. Once you get the hang of it and understand which passwords it asks for it’s a breeze. Plugs right into my iPhone (w/ usb-c) for management, and NFC as a backup.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified OnePack - Black
losPenguin Posted
In-store purchase... plenty in stock. Right out of box was easy to use. Manufacturer software optional as sites allow for plug and play to authenticate without additional software. Two-key option great in order to safeguard against loss of one. NFC tap-to-authenticate works great too without the need of plugging in constantly. This added layer of access authentication is a great way to better secure digital accounts. About half the size of a housekey and easy to carry. I would recommend using a cover for it on your keychain to further protect it from damage to the connector.
DMFR Posted
These are a must. It requires a little research to figure out how you want to use them, but the only way to truly do two factor authentication safety. Just make sure you grab two so you always have a backup ready to go! It’s worth the investment in securing your most important accounts and information.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
montana Posted
goood securitty tool make suren you have your keys with you if you put it on your keychain
montana Posted
as long as your roommate doesnt pick up your keychain while your aslee
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified OnePack - Black
Satya Posted
It was very good and compatible for work and office. I am using it for my office purpose very simple to configure and works much better and compatible with both windows and Macbook
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified OnePack - Black
49erMike Posted
The YubiKey is awesome! I didn't know too much about the different keys and their capabilities until I did a lot of research. I am not sure if this is the best key out there or not but I am very happy with what I discovered in my research and my use of it in the last several weeks. Its very responsive and plugged in or tapped and is feature rich. The only thing to keep in mind is that if you are looking to lock down your iCloud/Apple account you will need atleast two keys. Honestly, it would be a good practice to setup two keys for everything so you can stash one somewhere safe in case you lose the first one.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
ErikQ Posted
Does what it says, if you need more security on your devices and accounts, I highly recommend this product.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
HNDRX Posted
Handle all of my most important accounts, but you will need a second security key just in case you lose one I know Apple doesn’t allow you to only use 1 for example I use this yubikey alongside a ledger live
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
gadgeTT Posted
Everyone should be aware that weak and reused passwords are a terrible idea. Managing unique and complex passwords for dozens or more websites and apps is a real challenge. Hardware security keys like this YubiKey can provide not only an extra layer of protection, but also peace of mind since it’s basically a physical key for your digital content. Highlights: * Compact and light. * Flexible compatibility with USB-C and NFC. * Lanyard hole for convenience. * FIDO-compliant for wide industry support. * No batteries or charging. Room for Improvement: * Sold individually but highly recommended to have at least 2 with one as a backup. * Need to remember to take it with you when traveling, just in case. Setup: The key itself needs no setup per se. There is an optional app you can use to set various defaults and aspects of the key, but this is completely optional. All setup is done in the compatible apps or devices that you want to use it with. As an example, I use 1Password to maintain and manage all of my various complex and unique passwords for websites and apps. 1Password still needs a master password to unlock the archive of passwords for your stuff. As an extra layer of protection, you can link a hardware Security Key for two-factor authentication. While unique passwords are very secure, they are still prone to being mis-typed or intercepted and can be hacked. A physical (hardware) security key is nearly impossible to be duplicated or hacked, so it is much more secure. Provided you have it available, it is also convenient to use. With the YubiKey 5C, you can either plug in the key when requested to any USB-C port or if the device has NFC (like most iOS and Android phones), you can just place the key in close proximity of your device and then tap the pad to activate it. The current versions of Windows, MacOS, Android and iOS also support the use of hardware Security Keys as an additional method for 2-Factor Authentication, but best to check with whatever you want to secure to ensure that it supports a FIDO-compliant Security Key. This YubiKey 5C NFC is compatible with anything that supports FIDO-compliant hardware keys and has either USB-C or NFC. Usage: Once set up, when asked to present your Security Key by an app or website, either insert the YubiKey into an available USB-C port or place it near the device’s NFC reader, then tap the gold pad with the “Y” on it to authenticate. That should be it! Note that while only one Security Key is needed to set up this level of protection for your accounts, it is highly recommended to purchase and register two keys so that one can be used as a backup if needed. Think of these Security Keys like regular car or door lock keys but for software. If you have only one key for your car or one key for your home’s front door, and you loose that key, you won’t be able to get in. Having at least two YubiKey’s will provide a backup in case of loss. Also something to be aware of is depending on the app or web site that you use with the YubiKey and the settings for when the hardware Security Key is required, you may be need to authenticate with the YubiKey at unexpected times. If you don’t have the YubiKey with you and there are no alternate options available for that app or web site, you may not be able to log in. This is particularly important if you’re traveling or will be away from where you normally store your YubiKey, if you don’t always carry it with you. I recently went on a two-week international trip and forgot to bring my YubiKey with me. Something happened that logged me out of my 1Password archive and I could not get back in easily because my YubiKey was at home - thousands of miles away. Had I brought my spare key with me, this would have been much less of a hassle. As such, it is strongly recommended to own and register at least two YubiKeys and always take one with you if you travel or might be away from home. Having a backup is always a good idea and a backup Security Key will ensure you won’t get locked out… at least not for long. By the way, Yubico also makes several other models of Security Key to add to your collection. There are models with Lightening connectors for use with older iPhones and iPads, models with USB-A to support older computers, models without the NFC that are intended to be left in a USB port, and models with multiple other options. This 5C NFC key, however, is the most flexible for modern devices in my opinion since most everything has a USB-C port or NFC these days. It should be noted that once properly set up, someone would have to not only hack your passwords but also steal your physical Security Key to be able to get into your accounts. Just being close to you while you use your key won’t get them anywhere, as the NFC feature is very short range and only activated when you intentionally touch the gold pad on the key while it is being used. Overall: A hardware Security Key such as this YubiKey 5C NFC is a significantly better way to secure your digital life than using passwords alone. As long as it is set up properly in a compatible app or web site and you have it nearby if needed, you can rest assured that your digital life is much more protected.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
ryanmcv Posted
I've used some older models of YubiKeys but this is my first one with built-in NFC. If you're familiar with security keys or are looking to enhance your online security, your search should really end here. The YubiKey 5C NFC is compact, easy to use, and supports USB-C and NFC. === PROS === - The YubiKey 5C NFC supports all major authentication protocols used by major companies such as Google, Microsoft, Facebook, Apple, 1Password, and others. This includes FIDO2, U2F, etc. So it is almost guaranteed to work with your existing accounts and provide strong two-factor authentication. - I have tested the YubiKey on a variety of USB-C devices: my Windows laptop, a MacBook Pro, an iPad Pro, and an iPhone 15 Pro. It works perfectly and is instantly recognized. - With built-in NFC support, you can quickly and easily authenticate by tapping your phone on the YubiKey (rather than inserting it into the USB-C port). It's a big time-saver. - There is a small hole at the top of the YubiKey so you can attach it to your keychain. === CONS === - If you've never used a security key and aren't familiar with how they work or how to set them up, there might be a bit of a learning curve. Unfortunately, there aren't any setup instructions included in the package. The packaging directs you to visit the Yubico website and watch a video about how to set up the YubiKey with your various accounts. It's helpful, but less advanced users will probably need to seek out additional help or watch other instructional videos. - To activate the YubiKey when it is plugged into a USB-C port, you need to touch your finger atop a small sensor on the key itself. The sensor is very small and sometimes does not recognize my touch on the first attempt. - If you attach the YubiKey to a keychain, there is no cover or protection for the USB-C connector. So it could become bent or damaged while on your keychain. - You should absolutely be using two security keys with your accounts (one primary key; one backup key stored in a safe place in case you lose the primary key). Of course, this package only includes one YubiKey. So you may want to budget for a second YubiKey. I wish Yubico offered a 2-pack for a discounted price (maybe they do, but I didn't see a 2-pack during a quick search). === OVERALL === Advanced users will be very happy with the YubiKey 5C NFC. New or less advanced users might be confused at first, but luckily there are plenty of resources available to learn how to properly use these keys to add an important layer of extra security to your online accounts.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
nkpstudios Posted
The YubiKey 5C NFC is a compact and powerful device designed to enhance the security of your online accounts through strong hardware-based authentication. This is useful because it doesn't rely on an internet connection or app - keys are generated locally on the device and require a key touch to eliminate remote attacks. It supports protocols including FIDO2/WebAuthn (hardware-bound passkey), FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, Smart card (PIV), and OpenPGP. Useable across Android, Apple, Linux, and Windows, security is cross-platform, adapting to your scenario in the office, on the road, or at home on supported sites or logins via USB or NFC. Start your setup by removing the Yubikey and going to the site listed on your packaging for the site you want to register the key. There is a library of instructions for supported websites and videos to assist in the lengthy process per account. If you are on a corporate IT network or need to add your key, this will likely require approval at work to register, so consult with your IT department for more secure and custom uses. This product is resistant to tampering, water, and crushing through high-quality design. It does not require batteries or network connectivity, ensuring dependable authentication without downtime. Manufactured securely in the USA and Sweden, you can rest assured that there are no concerns about tainted chips from Chinese or other adversaries. Create identity certificates, digital signatures, and card authentication locally on the 5C NFC to keep on the go for times without the internet. While it has many strengths, there are areas where it could be improved to enhance users' experience. YubiKey 5C Strengths: 1. Enhanced Security: The YubiKey provides robust two-factor authentication, making it significantly more secure than traditional SMS-based or app-based methods. This is another way to stop SIM swaps and credential theft by needing this to sign in. 2. Easy to Use: Users can quickly authenticate their accounts with a simple plug-in or tap. It is user-friendly even for those who are not tech-savvy. 3. Compatibility: It works with various services and devices, including computers, smartphones, and tablets that support USB-C or NFC. 4. Durability: Built to last, the YubiKey is resistant to water and physical damage. 5. Portability: Its small size and keychain compatibility make it easy to carry around - this is also why you will lose it. Buy extras, HAHA. 6. Multi-Protocol Support: The key supports multiple authentication protocols, including FIDO2, U2F, OTP, OpenPGP, and smart card (PIV), allowing for modern phishing-resistant authentication with device-bound passkeys. 7. Forget Your Passwords!: Enables password-less login for compatible services, simplifying the login process while increasing security. 8. Cross-Platform Support: It is compatible with operating systems such as Windows, macOS, Linux, Android, and iOS. 9. Compliance: Helps meet regulatory requirements for data protection and access control in various industries. Things to Know: 1. No Cloud backup: YubiKey Authenticator does not offer cloud backup. You need to treat this like silver or gold and keep it in a safe. If you lose it, you will be stuck without a backup. 2. Limited Accounts: You get storage for 100 Passkeys and 64 accounts. 3. 2 keys REQUIRED for Apple registration: If there is something that goes wrong with your only key, you are stuck. A backup is necessary, and Apple always puts security first by locking things down handling authentication and security. 4. Enhanced Compatibility: Expanding support for more services and platforms will make YubiKey even more versatile. 5. Firmware is not upgradable: For security, the firmware is not upgradable, and therefore, you must buy a new YubiKey if you want the latest features and firmware. 6. Backup Solutions: Developing robust backup options for lost or stolen keys, such as easier recovery processes or support for multiple backup keys, would improve user confidence. 7. No Customization Options: There is just one color, so that's it. I would like to see user design made to order. Come up with some design program for custom YubiKeys much like kiosks for house keys. Conclusion: The YubiKey 5C NFC is a fantastic tool for securing online accounts with its robust security features and ease of use. While it excels in many areas, there are opportunities for improvement that could make it even more user-friendly. The YubiKey 5C NFC could become even more essential in a day and age of hacks, and you MUST protect yourself with hardware. This is my go-to recommendation for anyone who takes security seriously and is looking for easy to-use and very secure. Even though it's already really good, there are some ways it could be even better on the app/software side.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
tgpb Posted
Waste of money, not reliable, works on some accounts and had to redo others to get back in. If I hadn't waited so long to set them up, I would have returned them!
Posted
Hi there,
I'm sorry to hear about your disappointment and frustration with our product! If you'd like for our Support team to assist, we'd be more than happy to take a further look into this. Please contact us here, support.yubico.com/hc/en-us/requests/new
DBZfan Posted
[Employee of bestbuy] I recently purchased the Yubico YubiKey 5C NFC Two-Pack to add stronger protection to my online accounts, and I’m extremely satisfied with the experience. These security keys are a game-changer for 2FA (two-factor authentication) and have significantly increased my peace of mind. Setup & Compatibility: Setup was quick and intuitive. I was able to register each key with multiple services (Google, Microsoft, Dropbox, LastPass, and more) in just a few minutes. The fact that the keys support both USB-C and NFC gives you flexibility—plug one into your laptop or tap it to your phone for mobile authentication. Performance: The YubiKeys are fast, responsive, and extremely reliable. There’s no need to type codes from an app or text message anymore. Just tap or insert the key, and you’re logged in. The NFC works perfectly with my Android device, and I love how seamless it feels. Build Quality: These feel sturdy and well-made. The compact size means I can carry one on my keyring and leave the spare safely stored as a backup. I appreciate that there are two keys in the pack—this is especially useful if you want one for daily use and one as a secure backup. Security: I feel much safer knowing that even if someone gets my password, they can’t access my accounts without the physical key. These are FIDO certified and support modern authentication standards. Overall: Highly recommended for anyone serious about online security. They work exactly as advertised, are compatible with most platforms, and give you true hardware-based two-factor authentication. Worth every penny!
RSingh Posted
Yubikey 5C NFC is the most up-to-date version of the security key. It has several security protocols listed on the website in the product description. It is strongly built, has a touch interface, and supports NFC. The setup process, as described by Yubico on their website, is somewhere between not easy and not very difficult. You have to follow the step-by-step instructions provided by Yubico. The instructions state that you need to download either the Yubico Authenticator or the Yubico Manager. I tried both, and while both can set up the key, they have different layouts and functionalities and are not interchangeable. Let's first dig into the Yubico Manager setup process. Once installed, plug in the Yubikey 5C NFC. You will see the firmware number and serial number of the key. The interface is very simple, with home, applications, and interface tabs. The home tab displays information about the key and how many keys you have. If you have more than one key, it will show them here. The applications tab lists three options: OTP, FIDO2, and PIV. The interface tab shows all the security protocols it accepts, with six for USB and six for NFC. Both USB and NFC are functional, though NFC primarily works on mobile phones. The first step, as described in the setup instructions, is to set up the PIN for the key. You need to click the file in the applications (OTP, FIDO2, or PIV) and change the default PIN. This is a crucial step for authentication purposes. If you set up the key without setting up the PIN, you may not be able to log into your account or it may not set up the two factor authentication at all. Additionally, before adding the security key, I suggest setting up alternative two-factor authentication methods, like text message OTP or app-based OTP, in case the security key does not work as expected. Now, let's discuss the Yubico Authenticator. The Authenticator has more tabs and functionalities compared to the Yubico Manager. It can show the same information as the Yubico Manager but includes tabs like home, accounts, passkeys, and certificates. Most of the accounts you use the FIDO2 functionality. One key difference is that the Authenticator allows you to see the number of accounts and passkeys stored accessible via a PIN you set up. This security feature ensures that unauthorized users cannot access the information is stored on the key without knowing the PIN. With the Manager, you can delete the key if you lose it, removing it from your account but losing the keys and OTPs stored on it. Therefore, Yubico strongly advises having a backup key set up simultaneously At the same time as primary key and stored in a safe place. The factor authentication setup process is somewhat service-dependent. I have set up my Google (Gmail) and Microsoft email accounts. Each service provider governs the setup process. You need to enable two-factor authentication first, and I recommend having a backup authentication method in place before adding the security key. Plug the security key into your computer, or if using a cell phone, attach it to the USB-C port or use NFC. Install the Authenticator app on your phone, go to the two-factor authentication settings, and add the security key. Simply touch the key to validate and register it with your account. After this, logging into your account is straightforward. When you try to log in, whether it's Google or Microsoft, you will first be asked to use the hardware-based security key like Yubikey 5C. Touch the key, enter the PIN you set up, and you’re logged in. Overall, this hardware-based two-factor authentication is secure than app-based or OTP-based methods. If someone gains access to your phone, they can get the OTP, or if you don't have a network or internet, app-based authentication may not work. With the security key, you are always in control. It works like a charm. Yubikey authenticator can provide the OTP in case you do not have the physical key. Overall, I am very satisfied with the Yubikey 5C NFC and the many functionalities it provides.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
Ohanaman Posted
In a world where digital security is paramount, the YubiKey 5 C NFC stands out as a highly reliable and user-friendly solution for safeguarding your online accounts. After extensively testing this security key, here’s a detailed review from my perspective. Ease of Use: The YubiKey 5 C NFC excels in convenience and portability. Its compact design allows it to fit comfortably on a keychain, so you can carry it with you everywhere. The authentication process is incredibly straightforward: simply plug the key into a USB-C port or tap it on an NFC-enabled device. This seamless operation ensures you can secure your accounts quickly and effortlessly, whether you're at your desk or on the go. Compatibility: One of the most impressive aspects of the YubiKey 5 C NFC is its broad compatibility. It works with a wide range of services and platforms, including major ones like Google and Microsoft accounts, various password managers, and many other popular services. It supports multiple operating systems such as Windows, macOS, ChromeOS, and Linux, making it a versatile choice for users across different environments. The "Works With YubiKey" list helps you check compatibility with specific services, which is a nice touch for ensuring that your key will work with all your essential accounts. Multi-Protocol Support: The YubiKey 5 Series is renowned for its multi-protocol capabilities. It supports a variety of authentication methods, including FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, Smart card (PIV), and OpenPGP. This extensive range means that the YubiKey can adapt to various security needs and protocols, providing a robust defense against unauthorized access. Durability and Reliability: This security key is built to last. Its high-quality design ensures that it is resistant to tampering, water, and crushing. The fact that it requires no batteries or network connectivity adds to its reliability. You can count on it to function consistently without any downtime or connectivity issues, which is crucial for maintaining uninterrupted security. Yubico Authenticator App: For those who value a cohesive security experience, the Yubico Authenticator App is an excellent complement to the YubiKey 5 C NFC. It’s compatible with both mobile and desktop platforms, providing a secure and user-friendly way to manage your authentication codes. Overall Impressions: The YubiKey 5 C NFC is a top-notch security key that combines ease of use, extensive compatibility, and robust security features. Its compact design, versatile protocol support, and durable build make it a reliable choice for anyone looking to enhance their online security. Whether you’re a casual user or a security professional, this device offers a practical and effective solution to keep your digital accounts safe.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black
TheOffice1234 Posted
YUBIKEY 5C NFC Good Hardware – Needs better docs for beginners FIRST – YOU NEED TO KNOW 2FA (two factor authentication) and MFA (multi factor authentication) can be hard to configure and use no matter what product you choose. 90% of the complexity lays outside of the device itself. YUBIKEY It is nice that it is USB-C, thin, and overall compact and affordable. Unfortunately, YUBIKEY has done close to nothing to help you setup and use the key. The back of the package (you know the one you ripped opening it up and tossed in the trash), had on it “Get Started: ybuco.com/start”. This takes you to a generic video, but no step-by-step setup. Mostly the video (and much of the website) is prompting you to buy a second key, before you even used the first key, as a “backup”. If you scroll down on the website there exists a list of apps and instructions on how to setup the key for each site. But even then, the videos only give you a hint of where to go on your chosen site, much of the rest is still up to you to figure out. In some cases, even though the app is listed, there is no video. In some cases, the videos provided are not the correct ones for the selected app/service. If you are new to setting up a hardware key (as I am), expect a long learning curve. I might suggest some baby steps as listed below. BABY STEP USE CASE 1: Backup Authentication Method I already get 2FA via SMS and various authenticator apps, but sometimes these methods fail and I need another method to log in. So, with services that allow multiple authentication methods, (like SMS, Apps, and Keys), I configured YUBIKEY to be a backup key. This does not work on sites that only let you have a single MFA option. Eg Either SMS or a KEY but not both. BABY STEP USE CASE 2: Authentication to a Password Manager Another “easy” use case is to require the key to access your password manager. This is a good way to lock the front door to all your passwords without having to spend weeks and months trying to configure each site/app individually. BEYOND THE BASICS To really use the key (or any key) as you should, prepare to spend a lot of time researching and getting everything setup on an account-by-account basis for maximum security. Be prepared to install apps on your phones and PC’s. Also know that many accounts / apps / sites don’t support a key like this. RECOMMENDATION The YubiKey 5C NFC is a well-built product. From a hardware perspective it is very nice, thin and sturdy. Because this is such a complex topic, I wish they would have guided the user through setup in more of a step-by-step basis instead of leaving you to crawl the web to figure it out on your own. They do give you some hints, but they mostly point you in the general direction and leave the rest to you. There are not many of the financial institutions that I use that directly support the key for MFA (most just use SMS), so the best I can do is use the key in front of a password manager and make sure I change complex passwords frequently. If you think of this as a generic hardware device, like a USB drive then it is appropriate not to expect a lot of handholding. USB drive makers don’t give you any documentation to tell you how to use the drive, because you already know how to use it based on past experience with other USB drives. What is different in this case, is that what you are tying to use it for can be very complex. This complexity is not derived or due to the device itself, but of the nature of what it is used for.
This review is from Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Black