Shufflizer knows what songs you have listened to recently. These are indicated with a beenhere icon. Beenhere is a concept from maps, a symbol to indicate places on a map that you have visited. Shufflizer uses it to indicate songs that you have listened to.
Beenhere songs will be put at the end of the playlist the next time you randomize. Sometimes you don’t want this. Maybe you were auditioning a song deciding whether to add it to the playlist and don’t want this to count as a listen.
Beenhere can be cleared
You can clear the beenhere indicator by clicking on it. Now the song is treated as a song that has not yet played.