Listing/Grid Component
Listing is a basic component responsible for rendering grids, lists and tiles, providing filtering, pagination, sorting and other features.
Integration
Example configuration of Listing Component instance:
<your module root dir>/Magento/Cms/view/adminhtml/ui_component/cms_page_listing.xml
Data Source
Data Source is another UI Component that provides data in specific format which is shared among all UI Components.
The listing component requires the data source to be properly configured and associated with it:
<your module root dir>/Magento/Cms/view/adminhtml/ui_component/cms_page_listing.xml