WP Bakery is an easy method of building pages. You can add different kinds of elements which contain different functionalities. The so-called ‘Backend Editor’ shows the elements in a more schematic way, while the ‘Frontend Editor’ shows you how your page will actually turn out.
By clicking the plus icon you open an overview where all elements are shown.
Each of these elements has a small description about the functionality.
When you add an element you can change the column layout. You can also choose to move the elements by dragging them, using the drag icon.