Quality Score is a 1-10 rating Google assigns to each keyword in a Google Ads account, reflecting how relevant Google considers your ad and landing page to be for that keyword and the searcher’s intent. It directly influences how much you pay per click and where your ad ranks. Understanding Quality Score is one of the highest-leverage skills in Google Ads management, because a 1-point Quality Score improvement can produce 16% lower cost per click on the affected keyword. This post explains how Quality Score is calculated, what moves it, and the practical steps to improve it.
What Quality Score actually measures
Quality Score is calculated from three component signals, each rated as “Above average,” “Average,” or “Below average”:
- Expected click-through rate (CTR). The likelihood that someone searching this keyword will click your ad, compared to the average for the keyword.
- Ad relevance. How closely your ad matches the intent behind the keyword.
- Landing page experience. The quality and relevance of the page the ad sends users to.
Each component is rated independently. The composite Quality Score combines all three into the 1-10 rating visible in the keyword view of the Google Ads interface.
Why Quality Score matters financially
Google Ads uses a formula similar to: Ad Rank = Bid × Quality Score (with other adjustments). Higher Quality Score lets you rank higher at the same bid, or rank at the same position with a lower bid.
The cost impact is significant. A widely-cited rule of thumb: each additional Quality Score point reduces the actual cost per click by roughly 16% compared to the keyword’s base. Conversely, each point below the average increases the cost per click by roughly 16%. The compounded effect: a Quality Score 9 keyword can cost half what a Quality Score 5 keyword costs for the same position.
Across an account, raising the average Quality Score from 5 to 7 can produce 25-30% lower average cost per click without any other change.
What drives Expected CTR
Expected CTR measures the predicted likelihood that searchers click your ad when shown for this keyword. The strongest inputs:
- Historical CTR of the keyword in your account. Past performance is the strongest predictor.
- Match between the keyword and your ad copy. Ads that include the search query in the headline get more clicks than ads that do not.
- Ad copy quality. Specific benefits, clear value propositions, and natural language outperform generic copy.
- Use of ad extensions. Sitelinks, callouts, structured snippets, location extensions all increase CTR and feed back into expected CTR.
- Negative keywords. Filtering irrelevant queries prevents low-quality impressions that drag down CTR.
What drives Ad Relevance
Ad Relevance measures how closely your ad matches the intent behind the keyword the searcher used. The strongest inputs:
- Keyword in the ad headline. An ad for “plumber Valdosta” with “Plumber in Valdosta” in the headline scores higher than the same ad without.
- Tight ad group structure. Ad groups with 5-15 closely related keywords let you write ads that match all the keywords. Ad groups with 50+ unrelated keywords can’t produce relevant ads for any of them.
- Ad copy that matches search intent. A keyword like “emergency plumber” should match an ad that emphasizes emergency availability. A keyword like “plumber prices” should match an ad with transparent pricing.
What drives Landing Page Experience
Landing Page Experience measures the quality of the page the ad sends visitors to. The strongest inputs:
- Relevance to the ad. A landing page that delivers what the ad promised. An ad for “free local SEO audit” should lead to an actual free local SEO audit page, not a generic homepage.
- Page load speed. Slow landing pages hurt user experience and score lower.
- Mobile usability. Mobile-friendly pages score higher; non-responsive pages score lower.
- Original, useful content. Pages with thin, generic, or duplicate content score lower.
- Easy navigation. Clear next steps, no popup interruptions, accessible contact info.
- Trust signals. Real business contact info, transparent pricing or pricing clarity, secure HTTPS, no deceptive practices.
How to improve Quality Score: the practical playbook
Step 1: Audit current Quality Scores
In Google Ads, add the Quality Score column to the keywords view, plus the three component columns (Expected CTR, Ad Relevance, Landing Page Experience). Sort by Quality Score. Identify keywords scoring 6 or lower; these are the immediate optimization targets.
Step 2: Restructure ad groups by intent
Quality Score problems almost always stem from ad groups that are too broad. A single ad group targeting “Valdosta plumber + Valdosta emergency plumber + Valdosta plumbing repair + Valdosta water heater installation” cannot produce ads that match all four. Split into 4 ad groups, each with tight keyword themes and intent-matched ads.
Step 3: Rewrite ads to match keyword intent
For each ad group, write 2-3 responsive search ads with headlines that include the primary keyword theme. Use the keyword in at least one of the first two headlines (the most-shown positions). Match the body copy to the searcher intent.
Step 4: Add or improve ad extensions
Sitelinks, callouts, structured snippets, location extensions, call extensions where appropriate. Each extension increases CTR and signals quality to Google. Aim for at least 4 sitelinks, 4 callouts, and 1 structured snippet per campaign.
Step 5: Build or fix landing pages
For each ad group, the landing page should deliver on the ad’s promise. If the ad says “free audit,” the landing page should be a clear form for the free audit, not the homepage. If the ad mentions emergency service, the landing page should make emergency contact obvious. Page-load speed should be in the green range on mobile (under 3 seconds).
Step 6: Add negative keywords aggressively
Review the Search Terms report monthly. Add as negatives any query that is irrelevant, off-intent, or producing high impressions but no clicks. Negative keywords prevent low-quality impressions that drag down expected CTR.
Step 7: Monitor and iterate
Quality Score updates daily but stabilizes over weeks. Make a change, wait 2-4 weeks for performance to stabilize, then re-evaluate. Continuous small improvements beat one-time overhauls.
Common mistakes that drag Quality Score down
- Single-keyword ad groups (SKAGs) taken too far. SKAGs were a 2010s tactic that produced thousands of nearly identical ad groups. Modern best practice is intent-clustered ad groups with 5-15 closely related keywords.
- Generic ads. “Quality service at competitive prices” works for nothing and clicks well for nothing.
- Sending ad traffic to the homepage. The homepage is rarely the best landing page for a specific keyword’s intent.
- Ignoring mobile. Most Google Ads traffic is mobile. A landing page that loads slowly or breaks on mobile crushes Quality Score.
- Bidding on irrelevant keywords. Sometimes the right move is to remove a keyword entirely instead of trying to optimize a Quality Score 3.
- Letting the Search Terms report sit unreviewed. Negative keyword management is a continuous activity, not a one-time setup.
Quality Score realistic expectations
A well-managed account on common commercial keywords should have an average Quality Score in the 7-9 range. Branded keywords (your own business name) typically score 9-10. Highly competitive non-branded keywords may score 5-7 even with strong optimization. Quality Score 10 is rare and often requires very specific intent matching.
Quality Score is dynamic. A keyword can move from 6 to 8 within 2-4 weeks of focused optimization, and can drop back if the changes are not maintained.