What does a high-quality Score indicate?

  • Your bid is high enough to have your ad displayed.
  • Your ad and landing page are relevant and useful to a viewer.
  • You have been an AdWords user for a long time.
  • Your ad relevance and landing page are below average.

The correct answer is:

  • Your ad and landing page are relevant and useful to a viewer.

Explanation: Quality Score is intended to give you a general sense of the quality of your ads. Three factors determine your Quality Score:

  • Expected clickthrough rate
  • Ad relevance
  • Landing page experience

So, having a high-quality Score means that our systems think your ad and landing page are relevant and useful to someone looking at your ad.

Read more here: https://support.google.com/adwords/answer/7050591