Terms of service are rules which one must agree to abide by in order to use a service. Terms of service can also be a disclaimer, especially regarding the use of websites. The terms-of-service agreement is mainly used for legal purposes by websites and internet service providers that store a user's personal data. A legitimate terms-of-service agreement is legally binding, and may be subject to change.

Privacy Policy is a statement or a legal document (privacy law) that discloses some or all of the ways a party gathers, uses, discloses and manages a customer or client's data. In the case of a business it is often a statement that declares a party's policy on how it collects, stores, and releases personal information it collects.