new button?

[SPspaceboy]

Plan

premium

Country

USA

Device

dell chromebook, using online version

My Question or Issue

recently, i found this new button on the online version of spotify. (yes, i am a chromebook user) im deeply confused as to what it does?

[agesofruin]

Was going to post the same question. Hope someone can explain it! It is not clear what it does and leaving the cursor on top of it doesn't display any message about its function.