The Google Quality Score is a score given by Google that outlines the quality of your ad copy, keywords and landing pages. The higher the score, the more effective Google thinks the campaign will be.
The score uses a scale between 1 and 10 and assesses the click-through rate, ad relevance and landing page experience. The more relevant we make the ads and landing pages to the target keywords, the higher the quality score. The higher the score, the less you have to pay for the click and the more effective the ads should be.