Social gravity is like a force that pulls you away from certain things and toward other things in your life. It's kind of like how a magnet works - it pulls things toward itself and away from other things. For example, if you have a group of friends who always seem to be hanging out together, the social gravity between them is strong and it will pull each of them towards the others. It's like an invisible force that pulls people together. It helps explain why some people seem to be always around each other and why others don't make plans very often. Social gravity is an important part of social dynamics and plays an important role in how relationships form and develop.