Wayfinder is a MODx snippet, whose primary purpose is to generate navigational menus that automatically update to reflect changes made in the MODx document tree.
Each time Wayfinder is called, it scans a specified portion of the MODx document tree, finds all documents that satisfy specified conditions, and outputs a formatted listing of those documents.
Since you can make multiple calls to Wayfinder on a single page, and since each call can specify a different section of the document tree, you can have multiple navigational menus or document lists on a single page. For example you may wish to have a main menu at the top of the page, then along the sides have sub-menus for products, services, teams, roles, etc. -- each listing documents from a different portion of the document tree. You may additionally want a breadcrumb trail. All of these can co-exist on the same page.