The standard workspace has an editing pane and a Files panel. The editing pane can be in Split or Design view, with panels like Libraries, Insert, and CSS Designer.
A hamburger menu is usually an icon with three horizontal bars. It opens a menu or list of options.

A tab group is a set of panels grouped together under tabs. I can move them around, close the whole group, or close one panel at a time.
It lets me insert an image tag into the page.
These tags tell me what each part of a page is for.