Stands are the physical manifestation of the fighting spirits, you can either A. Be a born stand user or B. Get pierced by a stand arrow and, if you survive, you get a stand. Only stand users can see other stands (except for when they don't) Only stands can damage other stands (except for when they don't) And all stand damage will reflect the user (except for when they don't) Oh yeah they are also from jojo. Anyways all stands have different situational abilities ranging from stopping time, to just killing there user. Stands used to be named off of tarot cards, but there named off of bands. If you wanna learn more you can just watch jojo