Quality Score is one of the most misunderstood metrics in Google Ads. Advertisers obsess over it, yet many don’t understand what it actually measures or when it matters. This guide cuts through the confusion.
Key Takeaways
- Quality Score is a diagnostic tool, not a KPI — It helps you understand why ads underperform, but optimizing it directly is the wrong goal.
- Three components drive the score — Expected CTR, ad relevance, and landing page experience each contribute independently.
- Higher scores lower your costs — A 2-point improvement across your account can cut CPCs by 20-30%.
- Focus on high-spend, low-score keywords — Don't try to fix every keyword. Prioritize the ones that drive significant spend and conversions.
What Quality Score Actually Measures
Quality Score is Google’s rating of the quality and relevance of your keywords and ads. It’s displayed on a 1-10 scale at the keyword level in your account.
But here’s what most advertisers miss: Quality Score is a diagnostic tool, not a KPI. It’s a proxy metric that helps you understand why your ads might be underperforming. It’s not something you should optimize directly.
Google calculates Quality Score based on the historical performance of your ads compared to other advertisers. It answers a simple question: when someone searches this keyword, how likely is your ad to be relevant and useful?
The Three Components
Quality Score is built from three factors, each rated as “Below average,” “Average,” or “Above average”:
1. Expected Click-Through Rate (CTR)
This predicts how likely users are to click your ad when it shows for this keyword. It’s based on your historical CTR, adjusted for ad position and other factors.
A low expected CTR means Google thinks your ad isn’t compelling enough for this search. Either your ad copy doesn’t match user intent, or your offer isn’t attractive.
2. Ad Relevance
This measures how closely your ad matches the intent behind the keyword. If someone searches “emergency plumber London” and your ad talks about general home renovations, relevance will be low.
Low ad relevance usually means your ad groups are too broad. You’re trying to serve one ad to keywords with different intents.
3. Landing Page Experience
This evaluates whether your landing page delivers what the ad promises. Google considers:
- Is the content relevant to the search?
- Is the page easy to navigate?
- Does it load quickly?
- Is it mobile-friendly?
A poor landing page experience often indicates a disconnect between what your ad promises and what users actually find.
How Quality Score Affects Your Costs
Quality Score influences two things:
Ad Rank
Your ad position is determined by Ad Rank, which combines:
- Your bid
- Quality Score
- Expected impact of extensions and formats
Higher Quality Score = higher ad position at the same bid. Or equivalently, the same position at a lower bid.
Actual CPC
You don’t pay your maximum bid. You pay just enough to beat the Ad Rank of the advertiser below you. With a higher Quality Score, that amount is lower.
The math: A keyword with Quality Score 8 might cost €2 per click. The same keyword at Quality Score 4 might cost €4 per click for the same position.
Over thousands of clicks, this difference is substantial. A 2-point Quality Score improvement across your account could cut CPCs by 20-30%.
What Quality Score Doesn’t Tell You
Quality Score has significant limitations:
It’s backward-looking. Quality Score reflects historical performance. It doesn’t update instantly when you make changes. Improvements take days or weeks to reflect.
It’s keyword-level only. You don’t get Quality Score for your campaigns or account overall. You have to analyze it keyword by keyword.
It doesn’t include all ranking factors. Google uses many signals in the auction that aren’t captured in Quality Score. Context, device, location, time of day—these matter but aren’t visible.
It’s relative to competitors. A Quality Score of 7 today might become 6 tomorrow if competitors improve their ads.
It doesn’t account for conversion quality. You can have excellent Quality Score and still lose money because you’re attracting the wrong users.
How to Diagnose Quality Score Issues
Don’t try to improve Quality Score everywhere. Focus on keywords that matter:
Step 1: Filter for High-Value Keywords
In your Google Ads account, filter for keywords that:
- Have significant spend (€100+/month)
- Drive conversions
- Have Quality Score below 7
These are your highest-impact opportunities.
Step 2: Check Each Component
For each problem keyword, look at which component is dragging down the score:
| Component | Diagnosis |
|---|---|
| Expected CTR: Below average | Ad copy isn’t compelling, or the keyword is too broad |
| Ad Relevance: Below average | Ad doesn’t match keyword intent—likely an ad group structure problem |
| Landing Page: Below average | Landing page doesn’t match ad promise or has UX issues |
Step 3: Prioritize Fixes
Fix the lowest-rated component first. There’s no point improving ad copy if your landing page is terrible.
Practical Steps to Improve Each Component
Improving Expected CTR
Tighten your ad copy to the keyword. If the keyword is “project management software for agencies,” your headline should mention agencies, not generic “business” language.
Test emotional triggers. Numbers, questions, and urgency tend to improve CTR. “Save 5 Hours Weekly” beats “Improve Productivity.”
Use all available ad extensions. Sitelinks, callouts, and structured snippets make your ad larger and more clickable.
Check your competitive position. If you’re consistently in position 4+, low CTR might be a bid problem, not a copy problem.
Improving Ad Relevance
Restructure ad groups around single themes. The classic mistake: putting 50 keywords in one ad group with one generic ad. Break it up.
For lead generation campaigns, see our account structure guide for practical organization approaches.
Match keyword intent precisely. “Buy running shoes” and “best running shoes” have different intents. The first wants to purchase now; the second is researching. They need different ads.
Use keyword insertion carefully. Dynamic keyword insertion can improve relevance, but it creates awkward ads if your keywords aren’t well-grouped.
Improving Landing Page Experience
Ensure message match. The headline on your landing page should echo the promise in your ad. If your ad says “Free Trial,” the landing page should say “Free Trial,” not “Get Started.”
Speed matters. Test your page with Google PageSpeed Insights. Aim for a mobile score above 70. Every second of load time costs you conversions and Quality Score.
Make the page scannable. Users decide in seconds whether to stay. Clear headlines, bullet points, and obvious CTAs help.
Mobile-first design. Most searches are mobile. If your landing page requires pinching and zooming, expect poor scores.
For comprehensive tracking setup that helps diagnose landing page performance, see our tracking and measurement services.
When Quality Score Doesn’t Matter
Quality Score obsession can distract from what actually matters: profitable conversions.
Brand keywords: Your brand campaigns will almost always have Quality Score 8-10. Don’t waste time optimizing them further.
Low-volume keywords: A keyword getting 10 clicks per month isn’t worth hours of optimization. Focus on volume.
New keywords: Quality Score for new keywords is based on account history and takes time to calibrate. Don’t panic over initial scores.
Display and Video campaigns: Quality Score as shown in the interface is only for Search. Display and Video use different quality signals.
When you’re profitable: If a keyword converts profitably at scale, a Quality Score of 5 is fine. Don’t sacrifice conversion volume chasing a higher score.
Quality Score Benchmarks
What’s a “good” Quality Score? It depends on keyword type:
| Keyword Type | Typical QS | Goal |
|---|---|---|
| Brand terms | 8-10 | Maintain |
| High-intent commercial | 6-8 | 7+ |
| Broad research terms | 4-6 | Acceptable |
| Competitor terms | 3-5 | Expected (low relevance) |
Don’t expect Quality Score 10 on every keyword. Some keywords are inherently harder to achieve high relevance on.
The Quality Score Improvement Process
- Export keyword data with Quality Score and components
- Filter to high-spend, low-score keywords (QS < 7, spend > €100/month)
- Identify the weak component for each keyword
- Group keywords by issue type (CTR problems vs. relevance problems vs. landing page problems)
- Fix systematically: landing page issues first, then ad relevance, then CTR
- Wait 2-4 weeks before reassessing
- Measure cost impact, not just score changes
Common Mistakes
Chasing Quality Score instead of conversions. A keyword with Quality Score 5 that converts at €20 CPA beats a keyword with Quality Score 9 that converts at €50 CPA.
Over-segmenting ad groups. Single-keyword ad groups (SKAGs) were popular but create management nightmares and starve Google’s machine learning of data.
Ignoring the landing page. Most Quality Score problems are landing page problems. Advertisers tweak ad copy endlessly while ignoring terrible page experience.
Expecting instant results. Quality Score is a lagging indicator. Changes take weeks to reflect.
Get Your Account Audited
If your Google Ads costs are rising while Quality Scores stay flat, there may be structural issues in your account that quick fixes won’t solve.
Request a free Google Ads audit and we’ll analyze your Quality Score distribution, identify the highest-impact improvements, and show you exactly where your budget is being wasted.
For ongoing Google Ads management, we monitor Quality Score as one of many diagnostic signals—never as the goal itself.
Sources
- Quality Score definition and components — Google Ads Help
- Ad Rank and how it determines ad position — Google Ads Help
- PageSpeed Insights for landing page performance — Google Developers