in reviewing the T&Cs for my reply to the OP staying in HI, I noticed a new term which I hadn't seen before: -
Room Upgrade
For Platinum Elite members the best way is up! Based on room availability at check-in and
limited to a Member's personal guestroom, we’ll do our best to upgrade your room. Upgrades may include rooms with desirable views, rooms on high floors, corner rooms, rooms with special amenities, rooms on Executive Floors, or suites, subject to availability identified by each hotel. See terms and conditions for details.
https://www.marriott.com/rewards/mem...ts/platinum.mi
https://www.marriott.com/rewards/mem...nefits/gold.mi