199 The answer to my question

In response to my question about why I'm advertising for you know who for you know what, the friendly robot at Google has replied:

Hello Norma,

Thank you for taking the time to contact Google AdSense.

Since the ability for us to serve ads on a site depends on a number of factors, such as our ability to crawl the site, the content of each of the web pages, and the availability of related AdWords ads, Google does not guarantee that we'll always have relevant ads to display.

We appreciate you taking the time to offer us this feedback, and we
encourage you to continue to let us know how we can improve Google
AdSense.