I had this discussion with a peer way back a few years ago at one of my old jobs. Does Google want 100% accuracy in the ad’s that they are displaying?
My answer, as well as his, was No. I wish he had a different answer so I had something to debate, but we both agreed on the fact that Google does not want to have 100% accurate results.
Why? Because Google wants to profit. By leaving a margin of in-accuracy in both organic and sponsored results, we must go back to Google for a second try. A second trip = more possibilities that we will click on an ad.
As users become more wise about Sponsored ad’s, they begin to stop clicking on them. Plus users know that sponsored ad’s are normally in-accurate to their search (especially if the search is specific). Now Google is trying to figure out ways to stick ad’s in there without the user knowing so much. They are also trying to give higher precedence to ad’s that are trustworthy and already rank well for the terms. Double exposure for the client, plus more of a chance the visitor will see a recognizable company and click on it. It also means the visitor will see more than 1 large company, and will possibly click back for a second opinion on the same subject.
Oh Google… you are growing too wise for your own good.