A rest is a symbol and a concept for time in which no note sounds. Even though nothing seems to be happening, it keeps the flow of the beat and the phrase going and makes the next note land, so it is an important element.
The basic idea
Rests come in lengths, such as the quarter rest and the eighth rest. Like notes, they occupy time within the beat, so instead of simply deleting things, think about where and how long to leave silence.
Its role in writing and performing
Placing rests where the melody breathes, where the drums drop out, or at the seams of the chords gives groove and dynamics more contrast. Making room for silence before you add more notes also makes the star of the song easier to hear.
How to try it in a DAW
Shorten or delete notes in the piano roll and compare how the gaps sound. Putting a short rest just before a section change in particular makes the entry of the next sound feel much stronger.
How it differs from related terms
A rest is a span of silence, while a tie is notation that joins the same pitch to make it longer. Both are used to shape note lengths and phrasing.
A rest is not empty space; it is part of the music that shapes the rhythm. Try practicing deliberate silence starting from a short phrase.
