The URL mapping is the new feature provided in ASP.NET 2.0. URL mapping technology helps us map a particular URL to another URL. To help understand, we assume that you have a page called HomePage.aspx on the site to access the home page, all users have also used this page to access your homepage. But for some reason, you have to change the homepage to OriginalHome.aspx. Use the URL mapping at this time allows you to map to a new page without notifying the user.