Couchsurfing is a hospitality exchange service that connects travelers with locals who offer free accommodation in their homes. It allows people to stay with hosts, often on a couch or spare room, providing a unique opportunity to experience different cultures and meet new friends. The platform operates through a website and mobile app, where users can create profiles, search for hosts, and leave reviews. This community-driven approach encourages trust and safety, as both guests and hosts can read feedback from previous experiences, fostering a sense of connection and shared adventure.