Quality Score
Google's rating of the quality and relevance of your keywords and PPC ads. It is used to determine your cost per click (CPC) and multiplied by your maximum bid to determine your ad rank in the ad auction process.
Example in Practice
"A keyword with a Quality Score of 9/10 can pay significantly less for a top position than a competitor with a Quality Score of 3/10, even if the competitor bids more money."
Related Terms
Ad Rank
A value that's used to determine your ad position (where ads are shown on a page relative to other ads) and whether your ads will show at all. It is calculated by multiplying your Bid Amount by your Quality Score.
Search Impression Share
The percentage of impressions your ads actually received compared to the total number of impressions your ads were eligible to receive. It is the single most important metric for understanding market share and missed opportunity.
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