Representational State Transfer (REST) is a new technology that suits the requirements of flashing the requested contents from a database on to the web browser screen. A service is described as RESTful when it conforms to the tenets of REST Data Services implemented.
Web services enable applications to interact with one another over the web browser or any similar platform independent environment. In a typical web services scenario, a business application sends a request to a service at a given URL by using the protocol over HTTP. The service receives the request, processes it, and returns a response. The web services is found in the URI format and method of the service is described by the HTTP method like GET, POST, PUT, and DELETE.