Like you have the license keys that are required for running the simple applications like the Microsoft office or any other license product that you use either for the academic purpose or for the office purpose, you could also get the key for the hack that you would like to apply while playing the pubg game that could be played with the internet fully functioning. Since it is not an offline game many people are loving it and are spending many hours in just playing this game.
Anyway, like the license keys that we get for every application, we could also get the key for the pubg hack that has arrived in the market. Not everyone would get the same key. Also the key would serve as the best way of tracking back to the hack seller so that you do not lose your money. The key when applied could let you move forward in the game as per what is provided in the hack. If you want to know the opponents and their activities or plans then you could choose the hack that is most appropriate for this investigation.
Since you could not directly get to know how the other players in the game are thinking you should be able to understand the opponent mind set with the help of the code that is provided in the hack and that could hack the thinking of the opponents and then help you win the game. Well, since this is not a game that could be finished in one attempt or in one day you could always have a chance to apply the hack that is most appropriate to the stage at which you are playing the game. Hope you would now understand how a hack would help you progress in the game.