Ever since crates were added into PUBG, they have been extremely popular with gamers. Opening a crate gives you the change to win 1 of a selection of PUBG items to be used in game. Cases can be bought using points earned in game, but that's often a slow grind and so naturally, player's look for faster and cheaper alternatives.
As with CSGO, PUBG Case sites offer chances to win items using a 3rd party system. Each site has a unique set of cases with different odds and costs. Shop around and find the best PUBG site that suits your needs. Whether you're a high roller or looking for free PUBG skins, there are sites out there for you.
Using these PUBG sites listed will give you an easy time getting skins. You will get to open cases at a minimum price and have greater chances of winning skins. Some of these sites give you the chance to create customized cases and select your odds. They may also have free offers as well as provide you with working codes to use.