With this option activated, you can select the “author” of your choice and assign them to the posts in a campaign.
In the campaign editor, you will find the section “Feeds for this Campaign”, which will have a new option called “Author” next to “Feed URL”.
This option allows you to assign the author from each feed item or the author of the campaign for each particular feed. It’s important to keep in mind that if the author does not exist in the WordPress database, this option will create it. If no author is selected, the campaign author will be used.