The LinkBrowser can be used for manually creating and editing references between page contents and the database or other link types. In most cases links are automatically created by the LinkGenerator. You can add this automatically created links here in the LinkBrowser you can remove them or create new links.
The LinkBrowser also allows you to edit the link table contained in any CDF file, which holds all links between page contents and external resources such as database records, pages, internet pages etc.
The LinkBrowser offers various possibilities to edit the contents of text nodes on a catalog page and their linking to the database. In so far it is a very comfortable but also somewhat complicated program, which might take you a few minutes to learn.