Footer Top

Go to Storefront -> My Themes -> Customize. (If your store is a new store, you may need to go to Channel Manager -> Themes -> Edit Theme)

In the Theme Editor -> go to Footer / Column 1, Column 2, Column 3, Column 4, Column 5

Column 1: This section will automatically pull from the categories set up in your store.

Column 2: This section will automatically pull from the webpages set up in your store.

The remaining columns can be set up through the settings, as shown in the image above.

When you are happy with your changes, don't forget click Save and Publish to repackage the edited theme.