About Global.asax File in MVC

protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            WebApiConfig.Register(GlobalConfiguration.Configuration);
//it has configuration for Web Api template if you use in MVC4
                                                     
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
//this you can refer to my first message in my profile about Action Filters and global Filters
            RouteConfig.RegisterRoutes(RouteTable.Routes);
//this guides the user with the application i.e. navigation paths.
            BundleConfig.RegisterBundles(BundleTable.Bundles);
//this is used for bundling your scripts and styles(css) files so that the page load and its efficiency increases.
        }

this is a brief idea about Global.asax accept the solution if you find any help in it.
thank you
Happy Coding
Enjoy SD's