Controller One of the elements of model-view-controller (MVC) design pattern used for Joomla core components. The controller executes tasks that are being requested by the client or the system. The base API class we use for a controller is called JController.
Breadcrumbs A module that helps to display the location of each page as you browse through all the pages on the site. Speaking of navigation, links like Home >> Dream >> Corners are called breadcrumbs. Breadcrumbs appear by default; you can turn them off in Module Manager.