Malvertising, a portmanteau* of "malicious" and "advertising," is a cybersecurity threat where attackers inject malicious code into legitimate online ads. These ads can appear on reputable websites, potentially infecting users' devices with malware or redirecting them to phishing sites. As online advertising grows, malvertising poses an increasing risk to internet users and businesses alike.

* I learned a new word this week too!  Also known as a “portmanteau word” is a word blending the sounds and combining the meanings of two others, for example motel (from ‘motor’ and ‘hotel’) or brunch (from ‘breakfast’ and ‘lunch’.