Endorsement is a marketing strategy where a person, often a celebrity or expert, publicly supports a product or service. This support can take the form of advertisements, social media posts, or public appearances. The goal is to influence consumers' purchasing decisions by leveraging the endorser's credibility and popularity. In many cases, endorsements are formal agreements, where the endorser is compensated for their promotion. Brands like Nike and Coca-Cola frequently use endorsements to enhance their image and reach a wider audience. Consumers often trust endorsements, believing that the endorser genuinely likes or uses the product, which can lead to increased sales.