Merchants may wish to enable their product catalog data file, catalog.xml. This file can then be used by search engines and other third party services such as product feeds for comparison shopping engines or advanced in-site search functionality.
The "Enable but do not syndicate" option is also available for merchants who wish to enable their catalog.xml file, but do not want the file sent to search engines or other comparison shopping engines (for example, if you manage your own product feeds).

Figure 1. Enable and disable options for the catalog.xml file in the Promote Your Site on Search Engines section of Store Manager.