The ad generated at the top of the page of this thread is about ...
how to make banner ads.

Keywords can indeed generate certain ads, which is why we keep Ehell Dame apprised of what's going on where. (The reason that words like d@ting, rel@tionship and g*a*y automatically contain "@" instead of "a" and have asterisks between the letters is in hopes that they won't generate inappropriate ads.)
For once, I had the wherewithall to look in the right folder to find the answer to my question ( I was noticing rel@tionships & wondering, "why?"). I'm finally getting the hang of this site. Thanks!