I like to share the most are restaurants, hotels and supermarkets.
Of course everyone likes to share something about their favourite, most liked restaurants, but my opinion is that you need to share the bad things also.
It had happened to me that I give a 3* respond to a restaurant and they wrote to me that give them 5* with good respond and they give me a free meal. I did not do it. They neet to improve. It is the most important thing.
Hotels are the second on my list. The problem in this present is that you can find the same hotel at booking.com, airbnb.com, etc. You can find in this places different reviews. Who knows which one is valid? You know it. From where? Google maps. Google maps is the most reliable website. They can not edit it, they can not add too many reviews cause every one is using google maps. Everyone is sharing their opinion, like I do. And I keep going with it.
And the first thing on my list are supermarkets. I like to know where I can buy good consumables. My most viewed picture on google maps are made from a tobaco shop. The small things matters in here!