Social psychology is the study of how people think about, influence, and relate to others. It explores areas like social cognition, person perception, stereotypes, self-fulfilling prophecies, attribution theory, heuristics, attitudes, persuasion, altruism, aggression, conformity, and obedience. Key concepts include the fundamental attribution error, the false consensus effect, cognitive dissonance, and social influence through conformity, obedience, and group dynamics.