This plugin comes with some default fixtures you can use to set up you project easily by configuring some necessary data in YAML file, which you can load to your database.
If you are not familiar with the Sylius fixtures concept yet, please read this documentation page.
As you can see in here, cms fixtures are configured to be run under default suite. It means that after installing plugin all you need to do is run bin/console sylius:fixtures:load and all of cms fixtures will load as well.