Quality Score

Definition

A component of Google AdWords shrouded in mystery. A high Quality Score means that your ads, keywords and landing pages appear relevant to one another, to what a customer is searching for and, most importantly, to Google.

Resources

1. Settling the (Quality) Score: Using Quality Score to Guide Optimizations
2. Google's Quality Score Whitepaper Attempts to Set the Record Straight
3. Google Reveals 4 Things You Need to Know About Quality Score
4. How Do I Improve My PPC Quality Score?
5. The Ultimate Guide to PPC Landing Pages