Just as the name suggests, under the Generated Articles tab, you can find all the articles that you have generated till now. It only includes articles that were generated but not published.
Under the Published Articles tab, you can find all those articles that were generated & published using Abun.
The Scheduled Article tab includes articles that are scheduled to be published at a later date & time of your choice.
You can archive any generated article for later use. These articles will be visible under the Archived Articles tab.