A:Answeryes it will fit the s9, I use it to hold my note 9 and my s10 plus and no issues what so ever. I would suggest buying a streaming mount to hold your phone and not the basic one that comes with it, dont get me wrong the one it comes with works great and everything its just I personally am picky and worry about my phone an want it to be fully locked in for a just in case.
A:AnswerIt is a selfie stick cause you can place the Go Pro on it like we did and use the App (Go Pro App) and control it with your phone. That's what we used it for.
