What Is Web Api?
 

Web API is a framework for building HTTP services that can be consumed by a broad range of clients including browsers, mobiles, iphone and tablets. It is very similar to ASP.NET MVC since it contains the MVC features such as routing, controllers, action results, filter, model binders, IOC container or dependency injection. But it is not a part of the MVC Framework. It is a part of the core ASP.NET platform and can be used with MVC and other types of Web applications like Asp.Net WebForms. It can also be used as an stand-alone Web services application.

Asp.Net Web API is a framework for building HTTP services that can be consumed by a broad range of clients including browsers, mobiles, iphone and tablets.

ASP.NET Web API is an ideal platform for building RESTful applications on the .NET Framework

Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices.
Its main features are:
-It supports convention-based CRUD Actions since it works with HTTP verbs
GET,POST,PUT and DELETE.
-Responses have an Accept header and HTTP status code.
-It may accepts and generates the content which may not be object oriented
like images, PDF files etc.
-Responses are formatted by Web API’s MediaTypeFormatter into JSON, XML or
whatever format you want to add as a MediaTypeFormatter.

It can be hosted with in the applicaion or on IIS.

Thanks for sharing.