DVOA, or Defense-adjusted Value Over Average, is a statistic used in American football to measure a team's efficiency. It compares a team's performance on each play to the league average, adjusting for the strength of the opponent's defense. This allows for a more accurate assessment of how well a team is performing relative to others. The DVOA metric is expressed as a percentage, with positive values indicating above-average performance and negative values indicating below-average performance. Analysts and fans often use DVOA to evaluate teams and players, making it a valuable tool for understanding the dynamics of a football season.