You open the link. It looks like a professional developer tool. It has a progress bar, a PUBG logo, and a field for your "Character ID." You type your ID and select your UC amount. It pretends to "search for exploits."
If a generator asks for "Mobile Number Verification," they now have your real phone number. This is often combined with SIM swapping attacks. Worse, some ask for your full name and address to "send a confirmation code." That data is sold on the dark web. pubg uc generator