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It is not a vanity metric and it is not something you can game. Here is what Quality Score really measures and why it matters for your bottom line.
Quality Score is Google's 1–10 rating of the overall quality and relevance of your keywords, ads and landing pages. It appears at the keyword level inside your Google Ads account and is calculated every time a user's search triggers one of your ads. The number you see in your dashboard is an aggregated historical estimate — the real-time version Google uses in each auction is more granular and not directly visible to advertisers.
Think of Quality Score as a diagnostic tool, not a KPI. It tells you whether Google considers your ads and landing pages to be relevant and useful for the searches you are targeting. A high score means Google believes you are delivering a good experience; a low score means something in your setup — ad copy, keyword intent alignment or landing page — is falling short.
The critical thing to understand is that Quality Score directly influences two things: how much you pay per click (CPC) and where your ad appears on the page (ad rank). Google rewards relevance with lower costs and better positions. Ignore Quality Score entirely and you will almost certainly overpay for every click in your account.
Quality Score is built from three distinct components, each rated as Below Average, Average or Above Average. Understanding these individually is far more useful than staring at the composite 1–10 number.
Expected Click-Through Rate (CTR) measures how likely Google thinks users are to click your ad when it appears for a given keyword. This is based on the historical performance of your ads for that keyword, adjusted for ad position. If your expected CTR is Below Average, it typically means your ad copy is not compelling enough or your keyword-to-ad alignment is off. Users are seeing your ad and deciding it is not what they are looking for.
Ad Relevance assesses how closely your ad copy matches the intent behind the keyword. If someone searches for 'emergency plumber London' and your ad talks about general home improvement services, Google will rate your ad relevance poorly — and rightly so. This component rewards tight thematic alignment between your keywords and the specific ad copy they trigger.
Landing Page Experience evaluates the quality and relevance of the page users land on after clicking your ad. Google considers factors like page load speed, mobile-friendliness, original content, transparency about your business and how well the landing page content matches the ad and keyword intent. This is the component most advertisers neglect, and it is often the one with the biggest room for improvement.
Google Ads does not simply award positions to the highest bidder. Ad Rank — which determines both your position and whether your ad shows at all — is calculated by multiplying your maximum CPC bid by your Quality Score (along with the expected impact of ad extensions and other ad formats). This means a competitor bidding £5 with a Quality Score of 4 has the same Ad Rank as someone bidding £2.50 with a Quality Score of 8.
The practical implication is significant. Advertisers with higher Quality Scores consistently pay less per click for the same or better ad positions. Google has published data suggesting that moving from a Quality Score of 5 to 7 can reduce your CPC by roughly 28%, while dropping from 5 to 3 can increase costs by around 44%. Over the course of a year, across hundreds of keywords, these differences compound into tens of thousands of pounds.
This is why we tell every client that Quality Score optimisation is not a 'nice to have' — it is a direct lever on your cost per acquisition. If you are spending £10,000 per month on Google Ads and your average Quality Score is 5, improving it to 7 across your core keywords could save you £2,000–£3,000 monthly without changing your bids or budgets at all.
There is a surprising amount of bad advice circulating about Quality Score, even from experienced PPC practitioners. The most persistent myth is that Quality Score is a real-time ranking factor in every auction. The score you see in your dashboard is a historical aggregate. Google uses a more dynamic, real-time calculation during each auction that considers additional contextual signals like device, location, time of day and actual search terms. Your visible Quality Score is a useful directional indicator, but it is not the exact number being used in any given auction.
Another common misconception is that pausing and re-enabling keywords or restructuring campaigns will 'reset' a poor Quality Score. It does not work that way. Quality Score history follows the keyword, not the campaign structure. If you pause a keyword with a score of 3 and recreate it in a new campaign, Google's system will still associate historical performance data with that keyword-ad-landing page combination.
Perhaps the most damaging myth is that you should always aim for a Quality Score of 10 on every keyword. That is neither realistic nor commercially sensible. Branded keywords will naturally score 8–10 because you are the most relevant result. Generic, high-competition keywords might sit at 6–7 even with excellent optimisation, and that is perfectly acceptable if the economics work. Chasing a perfect score on every keyword often leads to over-segmented campaigns that are harder to manage and do not actually perform better.
Start with the diagnostics, not the composite score. Pull the three component columns (Expected CTR, Ad Relevance, Landing Page Experience) into your keyword view and sort by Below Average. This tells you exactly where the problems are. An ad relevance issue requires different action than a landing page experience issue, and lumping them together wastes time.
For Expected CTR improvements, focus on writing ad copy that directly addresses the searcher's intent and includes a clear, specific call to action. Test responsive search ads with varied headlines that incorporate your target keywords naturally. Pin your most relevant headline to position one so it always appears. Review your search terms report to identify irrelevant queries dragging down your CTR and add them as negative keywords.
For Ad Relevance, ensure each ad group contains tightly themed keywords — ideally no more than 10–15 per group. Every keyword in an ad group should be closely related enough that a single set of ads can speak to all of them naturally. If you find yourself writing ad copy that feels generic because the keywords are too diverse, split the ad group. This is the most straightforward fix in PPC and it works every time.
For Landing Page Experience, the fixes are more involved but often deliver the largest gains. Ensure your landing page loads in under 3 seconds, is fully mobile-responsive and contains content that directly matches the promise in your ad copy. If your ad says 'Free SEO Audit in 24 Hours', the landing page had better prominently feature that same offer — not a generic services overview. Add trust signals, keep forms short and make your page easy to navigate.
Google does not officially confirm the existence of an account-level Quality Score, but the evidence is overwhelming. New keywords in accounts with a strong performance history tend to start with higher Quality Scores than the same keywords in poorly performing accounts. This makes intuitive sense — Google uses all available signals to predict ad quality, and an account that consistently delivers relevant ads is more likely to continue doing so.
This has practical implications for how you manage your account. Running low-quality campaigns — even temporarily — can drag down the quality baseline for your entire account. If you are testing a new market or offer, it is worth being more selective about which keywords you target initially, rather than launching broadly and accumulating poor performance data.
Conversely, if you inherit an underperforming account, do not expect overnight improvements. Even after fixing ad copy, landing pages and campaign structure, it can take 4–8 weeks for Quality Scores to update meaningfully. Google's system needs to accumulate enough new performance data to override the historical signals. Patience and consistent execution are essential.
Quality Score is a means to an end, not the end itself. The goal of your campaigns is to generate leads, sales or revenue at an acceptable cost — not to achieve a perfect score on every keyword. There comes a point where further Quality Score optimisation delivers diminishing returns, and your time is better spent on bid strategy, audience targeting or conversion rate optimisation.
As a general rule, if your core keywords sit at 7 or above, you are in strong territory. The effort required to move from 7 to 9 is substantial, and the CPC reduction you will see is marginal compared to moving from 4 to 7. Focus your optimisation energy where the gap is largest.
We also see advertisers make the mistake of prioritising Quality Score over conversion performance. If a keyword has a Quality Score of 5 but converts at twice the rate of your Quality Score 9 keywords, it is delivering more value. Do not pause high-performing keywords because their Quality Score is not perfect. Optimise where you can, but let commercial results be the final arbiter of what stays and what goes.
We will audit your Google Ads account, identify the keywords dragging your performance down and show you exactly where to focus your optimisation efforts.