A trademark is a unique symbol, word, or phrase that identifies and distinguishes a company's products or services from others. For example, the iconic Nike swoosh or the Coca-Cola logo helps consumers recognize and trust these brands. Trademarks protect the brand's identity and ensure that customers know what they are getting. Registering a trademark gives the owner exclusive rights to use it, preventing others from using similar marks that could confuse consumers. This legal protection helps maintain a brand's reputation and value in the marketplace, making it essential for businesses like Apple and McDonald's to safeguard their identities.