A logo (from the Greek λογότυπος = logotipos) is a graphic element, symbol, or icon of a trademark or brand.

A unique logo is often necessary to avoid confusion in the marketplace among clients, suppliers, users, affiliates, and the general public. Once a logo is designed, one of the most effective means for protecting it is through registration as a trademark, so that no unauthorised third parties can use it, or interfere with the owner's use of it.