2pm late check-out, 25% bonus points on stays, free premium internet and upgrade to non-suite rooms are included in Marriott Gold, which is the second lowest tier of Marriott.
Marriott Gold status is a benefit of the American Express Platinum card and the American Express Business Platinum and now Chase is offering it for three months with the chance to extend it for three more stays.
Existing members can log into their account and see the direct link to offer.
Marriott Gold isn't the most inspiring of elite statuses, it doesn't really start getting better until you reach Platinum. You are still starting from square one to get to the 50 required elite nights for Platinum even though this offer doesn't seem to give you any fast track past Gold.
If Marriott stays, you should register for the offer as it is better than nothing. I wouldn't try to arrange stays in order to fulfill it.