Filters in MVC needs to be configured when you need something other to be done which is not provided by its member or methods.

You can configure your own custom filter by the following three ways :

(1)  Global level

By registering your filter into the Application_Start event of Global.aspx.cs class with the help of action filter.

    protected void Application_Start()
    {
     FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    }

(2) Controller level

By putting your filter on top of the controller name.

Authorize(Roles="Admin")]
public class AdminController : Controller
{
 //
}

(3) Action Level 

By putting your filter on top of the action.

    public class UserController : Controller
    {
     [Authorize(Users="User1,User2")]
     public ActionResult LinkLogin(string provider)
     {
     // TODO:
     return View();
     }
    }