It was a problem that Playerunknown's Battlegrounds was, and still is to a large extent, well known for. The company are making big strides in addressing that issue, and one such initiative, the so called Anti-Cheat Unit, is making major in-roads.

Eliminating every cheat and exploit is near-on impossible, but the Anti-Cheat unit are aggressively attacking the problem. There's a new video released by PUBG Corp which shows exactly what the team are doing to address cheating;

The team are constantly monitoring for unusual activity and "unauthorized actions" which they feel are affecting the game-play experience. As soon as a new exploit or hack is released into the wild, they aquire that exploit and begin to understand it's mechanism.

Once identified, they are able to patch exploits very rapidly. In addition, they use deep learning to enhance their efforts, by being able to quickly identify and analyze unusual in-game activity and understand the mechanism behind it.

The company is also working with international agencies to track down and arrest the creators and distributors of the tools. Apparently this occurred in April 2018, when a large hack sales company was taken down, and 15 people arrested.