What I love sharing the most on Google Maps is Photos of Hotels & Cafes interiors. I believe this is a big concern for anyone willing to travel to a new location - and wants a real life picture of the bed, washrooms and other amenities. Often the glamorous shots from the hotels catalog or online brochure is overwhelming and does not allow the viewer to judge space and or look into the minute details of a room. Cafes on the other hand are interesting - a little nice & cozy space which I feel like might help a fellow tourist I share.
This not only helps the tourist plan their stay or dine in location; but also saves the nerve wrecking and anxiousness of getting the perfect room/cafe. If I can help someone out through the photos and by marking the landmarks - and if the tourist goes in and has the same good experience as mine; I consider a good deed done for that day.
I believe with every pictures or location tags - there is a potential to help an individual visualize and reduce anxiousness of choosing a place to stay or dine at. Especially if travelling for the first time.