Purchased for use during travel. It’s much more convenient, as I can simply leave the original at home and keep this second one (and charger) in my laptop bag. Also, it’s always helpful to have a spare just in case one gets lost, breaks, or a kitten chews on it.
BEWARE of cheapo, third-party USB-C cables - if they don’t have the correct resistance, they can literally fry your device! And that kind of damage isn’t covered by warranty. I always buy genuine Apple accessories for my MacBook Pro, and this one was actually less expensive on sale than some inferior-quality knockoff junk cables. This cable also works perfectly to charge my wife’s Galaxy S9, Nintwndo Switch, and other USB-C devices; and although longer than needed, will work in a pinch as a data cable for USB-C external drives as well.
Note that this is NOT a Thunderbolt 3 cable and is NOT recommended for external PCIe devices such as eGPUs, for example.