What is "showreel"

n. A video portfolio demonstrating the talents of an actor, director, etc.

A showreel (also known as a demo reel) is a short piece of video or film footage showcasing an actor or presenter's previous work. Usually 2 to 3 minutes in length, a showreel typically supplements an artist's résumé and is used to promote the artist's skill, talent, and experience to acting agents and casting directors.