Advertisers prefer websites that qualify visitors for the purchase.Allow me to explain with this simple example: A search for "cell phones" canthrow up a page about the perils of cell phone radiation, a universityprofessor's treatise about messaging technologies and a buyer's guide thatcompares features and prices of top-selling cell phone models.
For an advertiser looking to target cell phone buyers, the buyer's guide offersthe most relevant (and therefore valuable) advertising space.
This is part of targeting your content.You want people to click on your ads. So do your advertisers.If you can keep your content focused on the products your advertisers areselling then you should be able to increase your CTR.
Of course, it’s also Google’s job to make sure that your ads match yourcontent, but if you’re writing about DVD’s it makes sense to produce contentthat encourages people to buy DVD’s because those are the sort of ads youknow you’re going to be served!
If you were writing about homebuying, you can be sure that you’d get adsabout mortgages and real estate agents. Put up pages about finding the rightmortgage or how to pick a real estate agent and not only do the ads lookeven more relevant, they’ll also appear more attractive.