31 Dec
Understanding how the Google Ad Auction Process Works
Posted in Internet Marketing, Local Search Engine Marketing, Search Engine Marketing (SEM) on 31.12.09 by Josh Nelson
Understanding How the Google Ad Auction Process Works
Many people believe that your position in the sponsored listings is driven exclusively by your bid price. There are actually several variables that come into play in addition to bid price to determine where your ad will appear in the sponsored listings:
- Max Bid Price – this is the max bid for a given search term – set by you
- Quality Score – is determined by Google based on a number of variables
- Click Through Rate (CTR)
- Relevance
- Quality of Landing Page
Your Max Bid Price X Quality Score = Your AdRank
- AdRank is the position in which you will appear in the listings.
Here is an example of how you Google determines your AdRank:
| Max Bid X | Quality Score = | AdRank | Rank | |
| Advertiser 1 | $4.00 | 1 | 4 | X |
| Advertiser 2 | $3.00 | 3 | 9 | 2 |
| Advertiser 3 | $2.00 | 6 | 12 | 1 |
| Advertiser 4 | $1.00 | 8 | 8 | 3 |
So in this example, the advertiser bidding $2.00 per bid with a 12 quality score actually ranks #1 and the advertiser bidding $4 does not even show up in the top three listings because his quality score is too low.
The next questions is, how is your Cost Per Click determined:
With Google, you only have to pay as much as the maximum bid of the bidder directly beneath you in the bidding auction.
Google has a formula that is written as P1 = b2q2 / Q1 - Ultimately it is AdRank of advertiser below / quality score of advertiser 1. Take a look at the example below:
So even though advertiser 1 bid $4.00 he is only paying $3.00 per click.
*** By increasing your Quality Score you can actually reduce your Cost Per Click and improve your position in the sponsored listings.










