Comment by carljungslabtek

You basically pointed this out already but there’s a big difference between something designed to notify you about something you might not have known, similar to what you’d find on a community bulletin board, and something trying to manipulate you into buying something you don’t need at all.

I think a lot of people use the term “ad” to refer solely to the latter category. This goes back to the origin of modern advertising (and even earlier with snake oil salesman and charlatans, which were scamming merchants using music and stage shows lol — sound familiar?) and using the term “public relations” as an alternative to “propaganda”.