The title says it all, this modification allows you as admin to make home page featured auctions to rotate without refreshing the page, imagine situation if on your page is listed only 3 featured auctions user will not see different featured auctions until he refresh the page.. 
 
This mod allows you to set intervals how often you want to refresh the featured auctions section, no matter how many of them you are showing on main page... 
 
All auctions will be refreshed and changed on the fly ( Ajax based)  without refreshing entire page, so now you will be able to make home page featured section even more worth to order, because auctions will be rotating to all users just watching home page.