A woman with her hand raised. ๐โโ๏ธ means "me!" or a woman asking for the floor.
It says "pick me," volunteers for a task, or answers a roll call. It also introduces a woman with an idea in a group thread, or a fan claiming she relates: "๐โโ๏ธ this is me."
Facts
Woman raising hand ๐โโ๏ธ is an emoji in the people and body category, under person gesture. It became part of the emoji standard in Emoji 4.0, released in 2016. It is a sequence that joins ๐ person raising hand and โ๏ธ female sign. Devices that do not know the sequence show those emoji side by side. It comes in five skin tones, from light to dark. On GitHub, Slack and other apps you can type it as :raising_hand_woman: or :woman_raising_hand:. People also look for it with words like โgestureโ, โhandโ, โhereโ, or โknowโ.