Go to Appearance → Menus → “create a new menu”.
Main and Footer Menu
Once you create your custom menu, go to “Menu Settings” and choose the menu location.
Repeat the same steps to create a footer menu.
Social Menu
Go to “Appearance” → “Menus” → “create a new menu”.
Under “Add menu items”, go to “Custom Links” and add URL + Link Text, hit “Add to Menu”.
Once you create your custom menu, go to “Menu Settings” and choose the menu location “Header Social Menu”.