State actions refer to the activities and decisions made by state governments that can affect individuals' rights and liberties. In the context of the 14th Amendment, these actions are scrutinized to ensure that states do not violate the protections guaranteed to citizens, particularly through the doctrine of selective incorporation, which applies certain Bill of Rights provisions to the states on a case-by-case basis. Understanding state actions is crucial for grasping how individual rights are safeguarded from potential overreach by state authorities.