Google Ad Auctions

Adwords! Googles biggest revenue generator. Included is a video presentation by Hal Varian (Googles Chief Economist) explaining in brief what Google considers when listings Ads. Hal covers various components are used to qualify websites in order for Google to present the best results for the user. The highest listing is not just determined by how much you are prepared to pay for an Ad, this is how Google maintains quality search results, and gets people returning to use their engine.