I recently came across a video from Isaac Rudansky (one of our customers) where he does a great job explaining how AdWords Quality Score works. Isaac’s video is factual, yet entertaining. If you’ve ever wondered how QS works, why you should care about it, and how to use tools like Optmyzr to improve it, take a look at this video.
If you’re more inclined to read an article on the topic, here is a post I wrote for SearchEngineJournal last year:
Quality Score Explained By a Former Googler (SearchEngineJournal.com)
And if you prefer just looking at some quick slides, here are a few that cover the bare minimum: