This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
- Download extension "tt_address" (min. version 3.1.0) and install it with the extension manager or via composer: https://typo3.org/extensions/repository/view/tt_address
- Download this extension "pb_tt_address_googlemaps" and install it with the extension manager or via composer
- Include the static typoscript from this extension in your template