Configuring the Legacy Content Delivery URL may be important to help the application fit into an existing web architecture or to allow it to be indexed by search engines.
Changing the Application Context URL Changing the application context lets you change the application's URL to help Legacy Content Delivery fit into your web hierarchy. It can be important to change your site URL to / if you want your site to be indexed by search engines, because many have a verification file that they want you to put into the / folder.