What is a "badge"?

A badge is a small piece of metal or cloth that is worn to signify an affiliation, achievement, or authority. Badges are often worn on clothing, such as uniforms or jackets, and they can be attached with a pin or a clip. Badges can be used for a variety of purposes, such as to identify members of a group or organization, to indicate rank or achievement, or to provide proof of authority, such as a police badge. Badges can also be decorative, and they may feature designs or symbols that are significant to the wearer or the organization they represent. Some badges are collectible or traded among enthusiasts, such as military or police badges, and they can hold historical or sentimental value.