Social class impacts a person in many ways. It is important to note that social class does not stand on its own: politics, economics, and many more categories intertwine with social class.
As a child, one is not able to control their environment, social class being one of those categories. Therefore, growing in this environment influences how one develops their ideas about that social class and others from out of that social class. Also, if an individual moves from one social class to another, the way how one socializes with those around them changes dramatically too.
Social class impacts how one decides to identify themselves as well. For example, if a person from a social class that has economic disadvantages, they would be more interested in helping those in the same position by engaging in policies that could improve that situation.