Adding friends on Spotify allows you to follow their listening activity, share playlists, and collaborate on playlists together. To friend someone on Spotify, you can either search for their username or email address, or you can click on their profile from a shared playlist or song.
Once you’ve found the person you want to add, click on the “Friend” button on their profile. They will receive a notification and will need to accept your request before you can become friends.