is arguably the most important application level network protocol for what we consider to be the internet. It is the protocol that allows web browsers and web servers to communicate. It is also becoming the most popular protocol for implementing web services. github 
The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser. wikipedia