Meaning
A vertical bar followed by two left-pointing triangles, the previous track button. It means jump back to the song, episode or item before this one.
In chat it signals going back to something earlier: an older topic, a previous version or an ex someone keeps returning to. “Honestly the old design was better ⏮️ bring it back” It mirrors ⏭️, and differs from ⏪, which only rewinds within the same track.