You will see the latest pictures taken by the mobile or web users, either:
related to a workflow submission
or related to a list item
Clicking on a picture displays it in full screen and allows you to see on the right more information related to it, such as:
Related Workflow question / List item
You can navigate through the pictures using the navigation arrows.
You can filter the pictures by clicking on the filter button, which are the 3 small lines on the top left panel of your screen, selecting:
You can also sort the photos in ascending or descending order by clicking on the tabs listed below, all found on the Top-left panel of the pictures tab.
You can download all the photos in bulk, as per applied filter or individually.