Yelp is a mobile application and website that allows users to search for local businesses and write reviews about their experiences. It was founded in 2004 and has become one of the most popular consumer review sites. The app allows users to find nearby restaurants, shops, and services based on reviews and ratings from other users. While users appreciate Yelp's usefulness, some question whether it fairly shows all reviews or favors some businesses over others. Yelp continues improving its search filters and social features to enhance users' experiences.