Xoost is a website that provides social search services. Xoost truly enables user participation in the search process, where users share search results that are ranked by click-through rates and recommendations based on the content users search for. This means that when you search for a particular keyword, you can see how many Xoost users have also searched for this keyword, and after searching with that keyword, which search results have been clicked on the most. Through this model, it genuinely uncovers the users' filtering and recommendation of search results.