The HTTP service is a component of the Application Server that provides capabilities for deploying web applications and making them accessible to HTTP clients. (For more information, see "Deploying a Web Application.")
The $http service is an AngularJS component that allows you to communicate with external HTTP servers via the browser's XMLHttpRequest object or JSONP. See $httpBackend mock for unit testing programmes that use the $http service.
The following are some of HTTP's advantages: Because there are fewer simultaneous connections, it uses less CPU and memory. It provides HTTP request/response pipelining. Because there are fewer TCP connections, it reduces network congestion.
http service in Advance AngularJS provides the functionality needed for asynchronous communication between the client and server. It also provides an easy way for clients to get data from servers, which makes it easier for them to work with RESTful APIs.
The benefits of using an http service are many. It is a more secure and reliable way to access a website.