Open Spotify on your phone, tablet, or computer
Go to your profile
Open the playlist you want to check
Look for the follower count under the playlist name or next to the playlist details
If you are on desktop, right-click the playlist and select Share or view playlist details to see follower information
If you manage the playlist, check the playlist page for the total number of followers
If the follower count is not visible, update Spotify and try again
Note that Spotify does not show the names of all playlist followers