This is the area placed under menu in the header. You can create or modify it simply using REVO Composer page builder and decide in which parts of your web this area has to be visible.
Under Menu Featured Area
Here is the place where you can create or modify your Under Menu Featured Area. Use the embedded REVO Composer in the same way you use it to build an individual page.
NOTE: To make the REVO Composer available, you need to have turned on the Use RevoComposer option in Theme Options > General Settings.