What is the tiny piece at the end of a shoelace called?

The tiny piece at the end of a shoelace is called an aglet. Aglets are commonly made of plastic or metal and function to make it easier to thread the lace through the eyelets of a shoe. They also help to prevent the lace from fraying and unraveling. Aglets can come in different shapes, sizes, and colors, adding a decorative element to the overall appearance of the shoe.