Google Ads Quality Score is an estimate, given on a scale from 1 to 10, that combines your keyword's ad relevance, expected click-through rate, and landing page experience, and it directly affects how much you pay per click. To achieve the same ad position, an advertiser with a low Quality Score can end up paying 20-50 percent more per click than a higher-scoring competitor. In this article, we cover the three components of Quality Score, its concrete effect on cost per click, the steps to take when your score is low, and a realistic take on the '10/10 obsession.'
What Is Google Ads Quality Score?
Quality Score is an estimated quality metric that Google calculates for every keyword in your account and displays on a scale from 1 to 10. It isn't a direct ranking factor on its own, but it's a key input into the 'Ad Rank' formula that determines your ad's position, and at the same bid amount, a higher Quality Score gets you a better position at a lower cost. Quality Score is calculated per keyword rather than at the account level, which is why some keywords in the same campaign can score 8/10 while others sit at 4/10.
What Are Quality Score's Three Components?
Google builds Quality Score from something close to a weighted average of three separate components, and it shows each one in the Google Ads interface labeled 'below average,' 'average,' or 'above average.'
1. Expected Click-Through Rate
Expected click-through rate estimates, based on that keyword's past performance, how often your ad gets clicked when it's shown. If a keyword gets a lot of impressions but few clicks, this component comes out low; that's usually a sign the ad copy doesn't match the search closely enough, or that competitors are offering a more persuasive message.
2. Ad Relevance
Ad relevance measures how closely your ad copy matches the user's search query. If the keyword is clinic appointment software but your headline delivers a generic 'software solutions' message, this component comes out low. Working the keyword, or a close variation of it, directly into your headline and description raises this component immediately.
3. Landing Page Experience
Landing page experience evaluates how relevant, fast-loading, and useful the page is that a user lands on after clicking your ad. Promising 'clinic appointment software' in the ad and then sending the user to a generic homepage, a page that loads too slowly, or one that doesn't display properly on mobile all drag this component down. Of the three components, landing page experience is usually the most overlooked and the easiest to fix; we cover this in detail in our landing page conversion optimization article.
How Does Quality Score Affect Cost Per Click?
The most concrete effect of Quality Score shows up in the cost per click you pay to achieve the same ad position. Google's Ad Rank formula is roughly based on your bid multiplied by your Quality Score, so an advertiser with a high Quality Score can bid lower and still appear in the same position as a lower-scoring competitor.
The Difference in a Concrete Example
To put a number on it: an advertiser bidding $1.50 per click with a Quality Score of 3/10 and a competitor bidding $1.00 per click with a Quality Score of 8/10 can land in a similar ad position; the higher-scoring advertiser may even outrank the other with a lower bid, and end up paying a lower actual cost per click. In accounts where we've moved Quality Score from the 3-4 range up to the 7-8 range, we regularly see cost per click drop by 20-40 percent. That translates directly into ad budget efficiency: the same budget buys more clicks, and therefore more potential customers.
What to Do When Your Quality Score Is Low
The first thing an advertiser facing a low Quality Score should do is check the Google Ads interface to see which component is the problem; because all three components are listed separately, you can pinpoint the actual issue instead of just saying 'it's low overall.'
- If expected CTR is low: Split your ad group into narrower, more tightly themed keyword clusters; cramming very different keywords into a single ad group means the ad copy never fits any of them well.
- If ad relevance is low: Work the keyword, or a very close variation, directly into your headline and description. Use headlines written specifically for that ad group instead of a generic, one-size-fits-all message.
- If landing page experience is low: Send users to a page that matches exactly what the ad promised, make sure it's mobile-friendly and loads quickly, and include a clear call to action.
- Review your negative keyword discipline. Getting impressions on irrelevant searches lowers your click-through rate and indirectly drags down expected CTR; our negative keywords guide is a useful reference here.
- Check your match types. Overly broad match settings can trigger your ad on irrelevant searches and pull your Quality Score down; we cover this in our Google Ads match types article.
These steps don't show results instantly; Google usually needs several weeks of fresh data to recalculate Quality Score after a change. It's normal for the score not to move the day after you make a change; plan on a patient two-to-three-week monitoring period.
How Does Ad Group Structure Affect Quality Score?
One of the most overlooked factors behind Quality Score is how narrow and tightly themed your ad group actually is. When an ad group contains 15-20 unrelated keywords, the single piece of ad copy written for that group can't fit any of them well, which drags down both expected click-through rate and ad relevance. A tight structure that focuses each ad group on a single topic, sometimes even a single keyword family, lets your ad copy speak directly to that narrow theme and raises Quality Score as a direct result. For example, splitting 'teeth whitening' and 'dental crowns' into separate ad groups instead of keeping them together makes it possible to write more relevant headlines for each.
Why Is Mobile Landing Page Experience Evaluated Separately?
Google factors mobile and desktop landing page performance in separately, because the vast majority of searches now happen on mobile devices. A page that loads quickly on desktop but takes four or five seconds on mobile drags down the Quality Score of your mobile traffic noticeably. Common culprits in the field include oversized images, unnecessary third-party scripts, and text that's too small to read comfortably on a phone. Checking your landing page's mobile load speed regularly with Google's own PageSpeed Insights tool can resolve Quality Score issues before you even need to look at the ad copy.
A Concrete Comparison of a Bad Setup vs. a Good One
To make the difference concrete, let's compare two scenarios. When a physiotherapy clinic runs all its services ('herniated disc treatment,' 'sports injury rehab,' 'spinal health') in a single ad group with a generic 'our physiotherapy services' headline and sends all traffic to the homepage, its Quality Score typically sits in the 3-4 range and cost per click runs around $1.75-$2.25. When the same clinic splits its services into separate ad groups, writes a service-specific headline for each ('Herniated Disc Physiotherapy, Book Your Appointment Today'), and sends each group to its own dedicated page, Quality Score typically climbs into the 7-8 range and cost per click drops to around $1.00-$1.25. Getting nearly twice as many clicks on the same budget is the concrete payoff of this one structural change.
A Realistic Look at the 10/10 Quality Score Obsession
Many advertisers aim for a 10/10 Quality Score on every keyword; this is neither realistic nor always necessary. Quality Score is a relative metric shaped by your competitors' average performance, and in some competitive sectors, a 7-8/10 already represents top-tier performance.
Track Cost and Conversions, Not the Score
The point of raising Quality Score isn't the score itself, but the lower cost per click and higher conversion rate it brings. If a keyword with a 6/10 Quality Score is already converting well at a low cost, the time and effort spent forcing it to 10/10 could be better spent on lower-performing keywords instead. It's more useful to treat Quality Score as a diagnostic tool that shows which keywords and ads need work, rather than as a goal in itself.
A Low Score on New Keywords Is Normal
A newly added keyword usually shows as 'not yet assessed' or a low score until it accumulates enough impression and click data. That doesn't mean the keyword is low quality; it just means Google doesn't have enough data yet. Rather than panicking and pausing a new keyword after two or three weeks of low scores, it's usually the right call to wait until enough data has built up.
Why Isn't Quality Score a Single Account-Wide Number?
Forgetting that Quality Score is calculated at the keyword level is a common misunderstanding. Some advertisers say things like 'our account's Quality Score is 7,' but there's no such thing as a single account-wide score. Every keyword has its own score, and they can vary widely. In a given account, brand-name keywords often score 9-10/10, while broad, competitive generic keywords might sit around 5-6/10. That's why optimization effort should focus not on the account as a whole, but on specific low-scoring, high-volume keywords; the effort spent raising the score on a low-volume keyword returns far less than the same effort spent on a keyword eating up most of your budget.
The Relationship Between Quality Score and ROAS
Quality Score isn't a direct component of ad return, but it has a strong indirect effect: lower cost per click and higher conversion rates let you generate more revenue from the same budget. Raising your Quality Score effectively improves your ad return along the way; if you want to see this relationship in concrete numbers, our what is ROAS article walks through the right measurement framework. And if you want to build Quality Score on solid foundations from the very start of your account setup, our Google Ads beginner's guide is a good place to start.
Conclusion: Quality Score Is a Mirror of Your Ad Efficiency
Google Ads Quality Score isn't a goal in itself; it's a mirror that shows how well your ad copy, targeting, and landing page match search intent. Tracking and improving its three components (expected CTR, ad relevance, landing page experience) separately both lowers your cost per click and raises the efficiency of your ad budget. If you'd like professional help raising your Quality Score and your overall Google Ads performance, our digital advertising management service is here for you; get in touch with us and let's evaluate your account together.