Crests

A crest is a heraldic representation with a symbol (device) placed above a shield on a coat of arms.

A crest is sometimes displayed on a small possession (often a "dogtag" type item) showing honor and pride for your race.

Crests feature heavily in the Argent Tournament, where every race (except for the Gilneas Worgen and Bilgewater Goblins, due to them being part of Cataclysm) gained at least one in-game representation of their crest.