- Click here to get started
- click the "Promotions" tab on the left side
- click on "Learn More" button on the first promotion
- at the bottom of the page click "Join Now" to join Marriott Rewards
- stay twice at any participating hotel between June 1 and August 31
- book your free night at any of 2,900+ hotels
- click here for more information
Of note, you can earn up to three free nights via this promotion.