What does a decrescendo tell performer to do?

A decrescendo is a musical notation that indicates a gradual decrease in volume. It is often notated with the symbol ">" or "dim." The opposite of a decrescendo is a crescendo, which indicates a gradual increase in volume.

When a decrescendo is marked in a piece of music, the performer should gradually reduce the volume of their playing until they reach the desired level. This can be done by reducing the amount of pressure applied to the instrument, or by playing more softly.

Decrescendos are often used to create a sense of drama or suspense in a piece of music. They can also be used to highlight a particular section or phrase.