Used in traditional Japanese music such as Noh or Renga, to indicate the start of a song. More specifically, the part alternation mark is displayed where the singer’s part begins.
This symbol looks sort of like a lopsided capital M; or a rollercoaster track showing a dip, and then a drop off to the right.
Part Alternation Mark was approved as part of Unicode 3.2 in 2002 and added to Emoji 1.0 in 2015.
U+303D
U+FE0F
〽️ Part alternation mark
〽️ Variation selector-16