The world's largest hotel company began testing ad sales months ago with brands such as United Airlines, Uber, Visa, American Express's Resy, Amazon's Audible, and Starbucks.
Marriott is following United Airlines and retailers like Walmart and DoorDash in monetizing customer data with ad networks.
"If we scale the platform to the 1 million rooms we have in the U.S. and Canada, our scale might be equivalent to a top-10 network," said Peggy Roe, Marriott's chief customer officer.
Advertisers can place ads on Marriott's site and app, in the marketing emails Marriott sends to guests, and on Wi-Fi log-in pages at hotels. can also reach Marriott customers as those customers search sites like Instagram.
Sean O'Neill