Squatter law is a pretty complex topic, but basically it refers to the laws that govern the rights of people who are occupying a property without the owner's permission. If someone is living on a property without paying rent or permission, they can potentially gain legal rights to the property after a certain period of time, which varies by state. The idea is that if the owner doesn't take action to remove the squatter within a certain timeframe, the squatter can claim adverse possession, which means they can argue they have a legitimate right to the property. It's a pretty controversial concept, and the laws surrounding it are different everywhere, so it's not always easy to understand how it works.