You can edit both the top header and the footer, adding in things like social media links.

In customizer, you will need to

 - Make sure 'Responsive Menu Style' is selected.

-  Activate 'Header top bar' if you would like to include social media links.

-  If using GT Translate in the header then set 'header Top Bar Display type.' is set to option 2 so that language options are aligned with the menu.