PuP means “Potentially unwanted Program”
IOBit software is ineffective at best, and an outright malicious scam at worst
They’ve stolen Malwarebytes intellectual property, their software (such as driver booster) invents fake errors to get you to buy it, and even occasionally installs or overwrites working drivers then asks you to pay to fix them (which can cause issues with things like printers).
An example here: https://www.reddit.com/r/techsupport/comments/369myy/iobit_it_really_is_a_scam_right/
and Here from Malwarebytes staff: https://forums.malwarebytes.com/topic/29681-iobit-steals-malwarebytes-intellectual-property/