What is a "double double" in the NBA and how does it impact a player's performance on the court?

In the NBA, a "double double" is when a player achieves double digits in two statistical categories during a game, typically in points and either rebounds, assists, steals, or blocks. This accomplishment shows a player's versatility and impact on the game, as they are contributing significantly in multiple areas. Double doubles can boost a player's confidence and momentum, leading to better overall performance on the court.