This began a long and intense period of brainstorming. The team liked the idea of charging by the click, thinking it was a way they could farm out not just search, as they had done with Netscape and Yahoo, but also advertising. “We knew we needed a lot of ads, and to have a lot of ads we also had to syndicate,” Kamangar said, performing the search function for sites like Yahoo but also selling ads for them. He knew that Page and Brin would resist allowing advertisers to pay for placement within search results. He also knew advertisers were wary. The CPC model was associated with low-quality ads that were harder to sell and were known as “remnant advertising.” Advertisers like to determine where and when their ads appear, and if they allowed a company like Google to put their ads on other Web sites, and allowed the Web sites to choose the times they would appear, the advertiser would lose control. Was there a system to serve both users and advertisers?

For months they came up empty. Members of the team remember Kamangar walking about with two fingers pressed to his lips, muttering, “I’m thinking, I’m thinking.” One day, he said, a “lightbulb went off.” What if Google combined the cost-per-click model with a measurement of whether users found the ad relevant? Google engineers could come up with an algorithm to measure the quality of the ads, he thought, assuming that more clicks meant users liked the ads. To sell them they could use what economists call a Vickery Auction, an idea suggested by a colleague, Eric Beach. In a Vickery Auction, named after William Vickery, the twentieth-century Canadian economist and Nobel laureate, after Google set a minimum bid price per keyword, the advertiser bids, say, fifteen dollars for a keyword. If the next bid is ten dollars, the winner only pays one cent more than the second highest bidder, saving nearly five dollars; the second-place bidder pays a penny more than the price bid by the third, and so on. The advantages for Google were many. By charging per click, Google could syndicate its ads-sell them on other Web sites as well as on Google search. The more ads it sold on different platforms, the more data Google collected, and thus the more reliant on Google advertisers became. And Google could automate the entire system, minimizing the size of its sales force.

The advantages for advertisers were manifest. They knew they were not being gouged, because they only paid a penny more than the next highest bidder. They benefited by being charged only when the user clicked on the ad. This gave them an incentive to produce a better ad because better ads produced more clicks, which lowered their cost per click. And by charging per click, Google opened online advertising to many small businesses who normally had nowhere else to turn but the Yellow Pages. By allowing Google to syndicate ads, advertisers were achieving the online equivalent of one-stop SHOPPING OFFERED by network television, whereby ads appeared on hundreds of local stations. And because the system was automated, advertisers were spared the expense of a monitoring system. They would simply transmit to Google their keywords, their bid per keyword, their monthly budget, and their billing information. And then using Google Analytics, they could monitor the results online.

Excerpted from Page 88-90 of ‘Googled: The end of the world as we know it’ by Ken Auletta