If you have a collection that you would like to make available to everyone, either because you want to offer a section of course for free or because you want your content to be completely free, follow these steps:
Navigate to the collection you want to make free under Content > Collections and click Edit. Under Pricing, select the Free for Everyone option.
NOTE: If you want to provide a collection for free, but you want users to sign up for access to the collection, we recommend you set the collection as 'Require access' and uncheck all the pricing options. Then, add the free collection to a freebie bundle.