Moderator, Marriott Bonvoy & FlyerTalk Evangelist
Join Date: Oct 2002
Location: McKinney, TX, USA
Programs: United Silver; AA Plat/2MM; Marriott LT Titanium; Hilton Gold
Posts: 11,775
EEO = Elite Exclusive Offer
They are various coupon based offers that Marriott gives to their elites. The more useful of them are things like Buy 1 night, Get 1 free, or Buy 1 Dinner, Get 1 free.
Marriott used to send them out as a booklet of coupons, but now they are all printable coupons accessed online. They are normally updated on a quarterly basis.