Quality Score
Quality Score (used by Google Ads) rates how relevant your ads, keywords, and landing pages are to the user. A higher Quality Score lowers your CPC and improves ad position — making it a lever for reducing advertising costs.
What is Quality Score?
Google Ads Quality Score is a 1–10 rating assigned to each keyword in your account, based on three components: Expected CTR (how often your ad is expected to be clicked), 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 searchers who click your ad).
Quality Score directly affects your Ad Rank (which determines ad position) and Cost Per Click. The formula: Ad Rank = Bid × Quality Score × Expected Impact of Extensions. A competitor bidding $2.00 with Quality Score 10 will outrank you bidding $3.50 with Quality Score 3 — and pay significantly less per click. This is why Quality Score optimisation is more cost-effective than simply raising bids.
For ecommerce brands, Quality Score matters most for Google Shopping (where it affects which products appear for which searches) and Google Search campaigns driving traffic to product or landing pages. Amazon has no publicly disclosed equivalent to Quality Score, but its A9 algorithm similarly rewards listings with strong relevance signals and conversion rates.
Why it matters for sellers
A Quality Score improvement from 4 to 8 on a keyword with $1.20 average CPC can reduce your effective CPC to $0.60–$0.80 — a 35–50% reduction in advertising cost for the same traffic. Across a large account, this means the same budget generates 35–50% more clicks. Quality Score optimisation is one of the highest-leverage activities in Google Ads management for ecommerce brands.
How to use Quality Score
Check Quality Scores in Google Ads Keyword tab (add the Quality Score column). Identify keywords scoring 4 or below — these are costing you significantly more per click. For each low-score keyword: tighten the match type, write ad copy that directly mirrors the keyword's intent, and ensure the landing page contains the keyword and directly answers the search intent.
Group keywords into tightly themed ad groups (5–15 keywords per group). Write 3 ads per group with headline 1 containing the exact keyword. For Shopify brands, ensure product landing pages load in under 2 seconds on mobile and contain the search term naturally in the H1 and first paragraph.
Real-world example
A pet brand runs Google Search for 'orthopedic dog bed'. Quality Score is 4/10. Analysis shows: Expected CTR is average, Ad Relevance is 'below average' (ad mentions 'dog beds' not specifically 'orthopedic'), Landing Page Experience is 'below average' (links to general dog beds page, not orthopedic category). They rewrite the ad to lead with 'Orthopedic Dog Beds' in headline 1, point to a specific orthopedic dog bed landing page. Quality Score rises to 8. CPC drops from $1.45 to $0.87 over 2 weeks.
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Frequently asked questions about Quality Score
Does Amazon have a Quality Score equivalent?
Not publicly. However, Amazon's A9 algorithm rewards relevance (keyword match in title, bullets, backend) and conversion performance (CTR × CVR) in ways that function similarly. A listing with high relevance for a keyword and strong conversion rate will achieve better organic rank and lower effective CPC in Sponsored Products than a low-relevance, low-converting listing.
How quickly does Quality Score update?
Quality Score is calculated in real time but the displayed score in the Google Ads interface typically updates within a few days to 2 weeks of making changes. Allow 2–4 weeks after optimisations before evaluating their impact on Quality Score. The underlying metrics (CTR, conversion rate) update faster than the displayed score.
Should I pause keywords with low Quality Scores?
Only if they are also unprofitable (high CPA relative to product margin). A keyword with Quality Score 4 but strong conversion volume and acceptable CPA is still worth running — just at a lower bid. Pause only keywords that combine low Quality Score with poor conversion performance. Prioritise Quality Score improvements (better ad copy, tighter ad groups, better landing pages) over pausing.