Terms of Service (ToS)
Definition - What does Terms of Service (ToS) mean?
Techopedia explains Terms of Service (ToS)
Elements of a ToS agreement can include privacy policies, accountability provisions, opt-out provisions and liability provisions. Some may set up arbitration for any user grievances. Many of them lay out a list of what users cannot do on a particular service, for example, post objectionable content, utilize services for specific commercial purposes, etc. In general, a ToS agreement serves to set up a foundational contract between the user and the service provider.