Usage Widgets
You can customize widgets in Admin -> Appearance -> Widgets.

Header
In the top header, you can see a contact information.

You can modify it in Admin -> Appearance -> Widgets -> Header sidebar

Pre footer
Second, below the Popular items is the Contact form.

You can also modify it in Pre footer sidebar like Popular items.

Footer
Second, below the Popular items is the Menu Footer

You can also modify it in Footer menu like Popular items.

Second, below the Popular items is the Galleries

You can also modify it in Footer menu like Popular items.

Second, below the Popular items is the App Downloads

You can also modify it in Footer menu like Popular items.

