Footer Menu/Custom menu
Also you can create any menu and use it for footer menu or widget

To configure footer blocks, you can set them in widgets
Admin -> Appearance -> Widget

Feel free to drag the widgets into the "Footer sidebar"
Go to Admin -> Appearance -> Menus and update menu "Quick links"

Go to Admin -> Appearance -> Theme Option > General.
- Config Copyright, Designed by, Site description, Address, Phone.

- Config Social
