Collections is a new feature of Smarticle. In short: With Collections you can bundle individual articles from your magazines in new collections and publish them as separate, new ePapers. For example, collections on any topics can be created quickly and easily (eg “Everything about drone photography”), which in turn can generate additional sales. You can easily unlock collection licenses in the Smarticle license shop.
How to set up and provide a Google Play Console Service-Account to SMARTICLE to enable the App publicationFollow steps 1 to 5 from this Google