The red card, or Tarjeta Roja, is a critical element in soccer, representing a severe violation that leads to a player's immediate expulsion from the game. Introduced by referee Ken Aston during the 1970 FIFA World Cup, it ensures fair play by penalizing offenses like violent conduct and denying goal-scoring opportunities. The International Football Association Board (IFAB) sets the guidelines for its issuance. The use of VAR technology has refined red card decisions, enhancing accuracy while maintaining the game's integrity. The red card not only impacts match strategy but also underscores the principles of sportsmanship and respect in soccer.