Level slider

This emoji is not particularly popular, and is more likely to be used by adults than by younger generations. It is most commonly used on Twitter, Instagram, and other social media platforms. This emoji is not considered rude, but rather is used to convey a message of adjusting settings or volume.

The history of this emoji is relatively short, as it was only recently added to the Unicode Standard in 2019. It is part of the "Objects" emoji category, which also includes other control knobs, levers, and switches. This emoji is often used to express the idea of controlling something, such as adjusting the volume of a device or changing settings. It can also be used to express the idea of adjusting or fine-tuning something, such as a plan or project.