Meaning
A vertical slider control on a track, like the faders found on a mixing desk or volume panel. It stands for fine control, raising or lowering a level step by step.
It is used for audio mixing, music production and adjusting settings, and figuratively for turning something up or down: “Turning the drama 🎚️ down to zero this week.” Producers and DJs often pair it with 🎛️ and 🎧.