Very Good Video Explaining QS

Leverage Archive

Leverage Archive

Woah! We've been at this a long time. What was true a year or two ago may not be true today. If you're interested in something a little more current, take a look at our recent blog posts.
Leverage Archive

Google produced a nice video laying the auction process and how raising quality score can decrease price.

It’s almost 10 minutes long, but if you want to see how actual CPCs are calculated, and receive a little bit of insight into quality score, it’s worth the few minutes of time.

http://www.youtube.com/watch?v=K7l0a2PVhPQ