Endorsement types refer to the various ways in which a person or organization supports or recommends a product, service, or idea. Common types include celebrity endorsements, where well-known figures promote a brand, and expert endorsements, where professionals in a specific field validate a product's effectiveness. Another type is testimonial endorsements, where satisfied customers share their positive experiences. Additionally, influencer endorsements leverage social media personalities to reach targeted audiences. Each type aims to build trust and credibility, influencing potential buyers' decisions.