I started sharing my experiences in different places in a waiting room without really thinking why I was doing it. Then Google send me a recap where I saw how my contributions helped people and how many times it has been seen, specially the pictures.
When I saw that one of my pictures has been seen 8 000 times in few months, I was so impressed that I did more and more.
Some places are very common like supermarkets or a gas station but there is always something to say.
What I prefer is to post on a positive experience in a new place I discovered especially abroad like museum, restaurant, beach or a hotel.
And to answer questions about accessibility or little things that make the place special.
Hope my posts help.