If you see sketchy ads on a website that's not supposed to be sketchy. Its probably taboola or outbrain. They often use near NSFW images (sexual & gore) in their click baits. I remember a few years ago, they'd also install malware on your system to change the default search engine to a Google lookalike. There were numerous articles online on "how to remove taboola malware".

This company should be sued to death instead of going public. Our slow to catch up legislation is to blame.