Quality Score
Quality Score is Google Ads' 1–10 diagnostic for how well your ad and landing page match search intent. Higher scores typically mean a lower cost per click.
Quality Score is Google Ads’ measure of how relevant and useful your keyword, ad and landing page are to a person searching for something.
What Quality Score Means in Marketing
Google runs an auction every time someone searches. The winner isn’t the highest bidder. The winner has the highest Ad Rank, which combines bid with quality. Quality Score is the diagnostic number that shows you how Google views your quality on a scale of 1 to 10.
A 10 means your ad is highly relevant to the keyword and your landing page delivers exactly what the searcher expects. A 1 means there’s a serious mismatch somewhere.
What makes Quality Score commercially important is the relationship between quality and cost. Google’s own documentation states that higher quality ads lead to lower cost per click. An advertiser with a Quality Score of 8 can appear above a competitor bidding more but scoring 4, and pay less for the click. That’s not a small efficiency gain. Over a large campaign, it compounds significantly.
How Quality Score Works
Quality Score is calculated at the keyword level across three components:
Expected CTR: Does Google’s model predict that people will click your ad when it appears for this keyword? This is partly based on historical performance of your ad and the keyword generally.
Ad Relevance: Does your ad copy match what someone searching that keyword wants? “Running shoes for flat feet” ads should mention flat feet, not just running shoes.
Landing Page Experience: Does your landing page deliver what the ad promised? Google’s crawler assesses page relevance, ease of navigation and load speed. A page that buries the product below three paragraphs of brand copy scores poorly.
Each component is rated below average, average or above average. The combined picture becomes the 1–10 score.
Quality Score Example
An advertiser selling accounting software runs ads for the keyword “small business accounting.” Their Quality Score is 4 because the ad copy is generic and the landing page is the homepage rather than a dedicated landing page. Rewriting the ad to mention small businesses specifically, and sending clicks to a page built around that use case, often moves the score to 7 or 8 and reduces CPC by a meaningful margin without any change to the bid.
Why Quality Score Matters for Marketers
A low Quality Score is a tax. You pay more per click for the same position than an advertiser whose ad is genuinely more relevant. Improving it is one of the few Google Ads levers that reduces cost while maintaining or improving position.
It also acts as a forcing function for better marketing. High Quality Score requires that your keyword, ad and landing page tell a coherent story. That coherence is not just good for the auction; it’s good for the customer experience and conversion rate.
Frequently Asked Questions
Does Quality Score directly affect Ad Rank?
Not directly. Google's documentation explicitly states that Quality Score is a diagnostic tool, not an auction input. The actual auction uses separate quality measures calculated in real time. But because those real-time quality signals and Quality Score use the same underlying components, a high Quality Score strongly predicts better Ad Rank performance.
What are the three components of Quality Score?
Expected click-through rate (how likely someone is to click your ad when shown for that keyword), ad relevance (how closely your ad matches the intent behind the search), and landing page experience (how relevant and useful your landing page is to people who click). Each component is rated below average, average or above average.
How can I improve a low Quality Score?
Tighten the match between keyword, ad copy and landing page. If someone searches 'running shoes for flat feet' and lands on a generic homepage, every component scores poorly. Send them to a page specifically about flat feet running shoes. Write ad copy that mirrors the search term. Use negative keywords to stop the ad appearing for irrelevant queries.