More than one URL can map to the same site base URL. Note that the site base URL may not be the public URL as the site base URL value is set to null by default.

The list of alternative URLs provides a direct mapping to site context and allows you to add additional URLs whenever needed. These URLs do not need to follow a specific pattern, but you should choose values that do not conflict with the site base URLs.

Additional URLs are only used for runtime site context determination, are not used for link generation and do not require transformation rules.