Facebook is an effective way to communicate to a various groups of people. Currently, I am an administrator of our community's Facebook page, Hudson Days. I use this to connect our annual community event to people who have connections with the city of Hudson.
https://www.facebook.com/hudsondaysI have also seen classrooms and schools utilize Facebook as a way of communicating with parents and the community. My daughter's preschool has a page that I visit often.
https://www.facebook.com/HumptyDumptyPreschoolHudson