Many web publishers use Google Adsense to monetize their traffic. As a small-to-mid-level webmaster, however, working with such a massive affiliate has its drawback. For example, depending on your target audience, readers might automatically filtre Google Ads from their sight. A more conventional problem, however, is that if Google can't find any ads that are relevant to you content, they will place a public service ad. These also have their drawbacks. As the PPC Marketing Guide explain:

There are a couple reasons you want to get rid of Public Service Advertisements on your site.

1. You don’t get paid for clicks to PSA ads
2. Public Service Advertisments don’t carry the same look as your other Google ads. This distracts visitors and creates a bad impression of your site.

There are a few ways to get rid of these ads.

No, of course, if you are set on using Google Ads to monetize your traffic, you should check out the Complete Article for more details. Alternatively, you can start start shopping around for a PPC Affiliate who can provide ads that are more targetted to your site's audience. In that case, you should check out the links below on how to choose a PPC Affiliate that is best for you.

Related Posts: Choosing the Right PPC Affiliate Program for You
Part I: Intro
Part II: Reputation
Part III: Money
Part IV: Bids
Part V: Clickfraud