Anti-cheat software checks for wallhacks, aimbots, boosting, and even whether players are using scripts to cheat. It makes sure your game is fair, fun and safe for everybody.
Some tools offer more
Some anti-cheat technology may offer other services, such as reporting your churn and AFK rate (away from keyboard).
They shouldn’t affect gameplay
In most cases, you’d plug in your anti-cheat software with your matchmaker or orchestration system, which is usually tackled on the server-side. So none of your players will need to download or install anything.