Pop up Apple Security ads

The messages are scam attempts, presented by criminals. Do not interact with the message or the sender. For information from Apple regarding such bogus messages, please read the information at the link below. 

Recognize and avoid social engineering schemes ... - Apple Support

Those messages might appear as if they are from "Apple", but they are not. They are scams trying to trick you into buying useless software to fix an issue that does not exist.

By the way......Facebook was paid to display those messages. That says a lot about the quality control at FB.

Now you know how Meta can generate billions of dollars in revenue when they give you access to Facebook for free. Unfortunately many users have fallen for those scammers that paid Facebook and have not only had their accounts compromised but also their financial information. No, Meta will not get your money back for you and will maintain that they are not liable.