In everyday terms, trademarks are brand identifiers.

More accurately, a trademark is a name, symbol, or other device that functions as a source identifier for a good or service offered in commerce. Trademark law allows the owner of a trademark right to prevent others from using their trademark in a way that is likely to confuse consumers as to the source of goods or services. 

Trademark law allows trademark owners to protect their brand identifiers from unauthorized use that may confuse consumers regarding the source the goods or services they are purchasing.

Trademarks are distinct from copyrights, which protect creative expression, and patents, which protect novel ideas, inventions, formulas, plants, and designs.

It is important to note that trademarks and trademark registrations are related but different concepts. See trademark registration for additional information.