The "Terms of Service" (ToS) is a legal agreement between a service provider and its users. It outlines the rules and guidelines that users must follow when using a website, app, or service. This document typically includes information about user rights, responsibilities, and the consequences of violating the terms. Additionally, the ToS often covers topics such as privacy policies, intellectual property, and dispute resolution. By agreeing to the ToS, users consent to abide by these rules, which helps protect both the service provider and the users from potential legal issues.