Could someone explain council housing/estates?

Posted by RedSolez@reddit | AskUK | View on Reddit | 77 comments

I am an American who reads a lot of thrillers, many by British authors. A few times I've seen references to council housing and council estates. I understand vaguely what that means from context clues and Googling, but since we don't have the same kind of government subsidized housing in the US I'm wondering if anyone in the UK who is familiar with both systems could explain it like I'm 5? Are the estates like what we'd refer to as housing developments? Do you find council housing in all different socioeconomic areas?