Recently, I bought a brand new violin. As I was looking at the parts that came with it, I saw a part called a violin mute. What does that violin mute do?
Violin muted make it easier to play music quite without annoying people nearby. Alongside being used to quite the sounds of the violin, violin mute are also often used in pieces of music. Some music pieces specifically suggests to use a violin mute. For example, this piece, Arlington Sketches, it specifically tells us to use a mute in certain parts.
Here, before measure 96, you have to put on the violin mute.
And take it off after measure 126.