Hi,
There are always many reasons for sharing information on social media. Every one has its own motivation for doing so but the reason why I choose Google map to share information as a local guide is as following.
First of all maps can talk, you can easily show different places in your city to the others. show them about your communities culture, architecture, foods and many other aspects of life; and guess what, Google Maps provides all the tools to tour easily and fast throw your city.
Second of all, there are so many resources in maps, you might need to find local businesses, cinemas, service centers and many more places which Google map provides for you. These data must be up to data and complete and this is why I like to share data as a local guide.
Finally, I am a GIS student and wow I like maps. This is why I like Google Maps technologies and like to contribute making them grow even in countries like Iran which there are not any ways to get informations, get Google Street view and so on.