Aggression in heads-up play is vital for maintaining control, applying pressure, and forcing opponents into mistakes. Since blinds come around quickly, passive play leads to chip depletion, making an assertive strategy necessary for survival. By dictating the pace and putting opponents on the defensive, an aggressive player can capitalize on uncertainty and extract value from weaker holdings. Well-timed aggression also builds an image that can be leveraged for bluffs and thin value bets, creating long-term advantages in the match.