Explain attribute based routing in MVC?

In ASP.NET MVC 5.0 we have a new attribute route,cBy using the “Route” attribute we can define the URL structure. For example in the below code we have decorated the “GotoAbout” action with the route attribute. The route attribute says that the “GotoAbout” can be invoked using the URL structure “Users/about”.
 
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1. public class HomeController: Controller  
2. {  
3.     [Route(“Users/about”)]  
4.     publicActionResultGotoAbout()  
5.     {  
6.         return View();  
7.     }  
8. }