When you search for something there's usually a few text ads on result page that have something to do with what you're searching for. For instance, yesterday I was looking up something on domain hosting and got a text ad above my results for
Verio.com, which does something to do with domains, I'm not sure. The ones above your results are more expensive, the ones to the side are cheaper. That's why you usually see bigger companies have the spots above the results.