Content Settings: Universal settings for your content areas, like content fonts, content backgrounds, and blog and post layout settings.
Footer Settings: customizing your footer with content using widgets, and adjust the layout and style.
Code: you may need to enter a section of HTML Code to your header or footer areas, like if setting up Google Analytics tracking code. This is where you do this.
Settings: Social Media icons and links, site Title Tag, Site Icon (Favicon) and Menus are adjusted here.