OPS, or On-Base Plus Slugging, is a popular and straightforward baseball statistic used to evaluate a hitter's overall offensive production. It's calculated by simply adding a player's on-base percentage (OBP) to their slugging percentage (SLG). OBP measures how often a player reaches base, while SLG measures a player's power. While it doesn't capture every nuance of hitting, OPS provides a quick and easy way to compare hitters and gauge their combined ability to get on base and hit for extra bases. A higher OPS generally indicates a more valuable offensive player.