Can Marriott Platinum help a friend book a hotel to upgrade?

booking a hotel for a friend can help you upgrade your room, but you can't get points and room nights. Generally, hotels follow the principle of "whoever pays, enjoys points and room nights". You can't get senior membership treatment when you book a hotel for a friend, but as a platinum member, you can still enjoy your own preferential policies and upgrade to a better room type. Marriott has strict regulations on the treatment of members, and it is not allowed to transfer personal rights to others for use.