Transactional analysis is a technique used to understand interpersonal relationships and behavior, especially in organizations. It was introduced by Eric Berne and views personality and dynamics through ego states (parent, adult, child) and transactions between individuals. Key concepts include analysis of self-awareness using the Johari window model, understanding ego states and how they influence transactions, analyzing communication patterns and "games" people play, and identifying core beliefs about self and others through life positions and use of recognition ("stroking"). The goal is improved self-understanding and interpersonal relationships.