Here you specify whether the cut in should be included in all episodes or only in episodes from a certain release date. By default, the date of the release of your first episode in your RSS feed is preset here. You can change the date according to your wishes.
Your first episode was released on 03/22/2021, but you want to integrate the Cut In only in episodes of the current year. Then enter 01/01/2022 as the date and the Cut In will be integrated into all episodes that were released on and after 01/01/2022.