With Bluetooth, it is easy to make a connection from a computer, Apple or Android smartphone - or tablet. Even a smartwatch in some cases. Because your devices remember they have been paired, you only need to do this once, and the next time they are close to each other. They reconnect!
A lot of Bluetooth speakers can remember more than one device; this makes it easy and user-friendly when you just want to listen to some music.
Something new and exciting if you look at Bluetooth speakers is NFC parring. Simply put this can create a connection from your phone to your speaker, with nothing but a touch. Very clever and extremely user-friendly!