HTTP (Hypertext Transfer Protocol) is the standard protocol used for communication between web browsers and web servers over the internet. HTTP defines a set of rules and conventions for requesting and transmitting hypertext documents (e.g., HTML pages, images, videos) between client and server applications. HTTP supports various methods (e.g., GET, POST, PUT, DELETE) for performing actions on web resources and uses URIs (Uniform Resource Identifiers) to identify and locate resources on the web.