Most advertisers obsess over budget and ignore the metric that determines how much they actually pay per click. Quality score sits at the centre of Google Ads' auction mechanics, and getting it wrong means paying more for worse positions — often without realising it.
This article explains what quality score is, how each component works, what genuinely moves the needle, and what most guides get wrong about optimising it.
What Is Quality Score in Google Ads?
Quality score is Google's 1–10 rating of the relevance and usefulness of your keywords, ads, and landing pages. According to Google, it's calculated using three components: expected click-through rate (CTR), ad relevance, and landing page experience. Each is rated as Below Average, Average, or Above Average.
It's worth being precise here: quality score is a diagnostic indicator, not a direct input into the real-time auction. The actual auction uses a related but distinct calculation called Ad Rank, which incorporates quality signals alongside your bid. Still, a low quality score is a reliable signal that something in your account is misaligned — and it almost always costs you money.
A score of 7 or above is generally where performance stabilises. Scores of 3 or below are where accounts start haemorrhaging spend on clicks that convert poorly.
How Quality Score Is Calculated
Understanding the three components individually is more useful than treating quality score as a single opaque number.
Expected CTR measures how likely your ad is to be clicked given the keyword being searched. This is calculated historically, relative to other advertisers bidding on the same term. If your ad has a weak headline or a generic call to action, expected CTR suffers. What many advertisers miss here is that Google uses historical data at the keyword level — so a newly added keyword starts with neutral status, not a clean slate.
Ad relevance assesses how closely your ad copy matches the intent of the search query. A common mistake we saw repeatedly during nine years running a marketing agency was accounts grouping too many keywords into a single ad group. One ad trying to speak to five different search intents will score poorly on ad relevance across most of them. Tighter ad groups — ideally single keyword ad groups (SKAGs) or close variants — consistently improved this component.
Landing page experience is where most SMEs lose points they didn't know they were losing. Google evaluates load speed, mobile usability, content relevance, and transparency. Sending traffic from a specific ad about, say, office cleaning contracts to a generic homepage is a reliable way to score Below Average here.
| Component | What Google Evaluates | Common Failure Point |
|---|---|---|
| Expected CTR | Historical click rate vs. competitors | Weak headlines, generic copy |
| Ad Relevance | Match between ad copy and search intent | Oversized ad groups |
| Landing Page Experience | Relevance, speed, mobile usability | Generic landing pages, slow load |
Why Quality Score Affects What You Pay
This is the mechanical reason quality score matters financially, and it's worth understanding clearly.
Ad Rank is calculated as: bid × quality factors × expected impact of ad extensions. A higher quality score means you can achieve the same or better Ad Rank with a lower bid. In practice, an advertiser with a quality score of 8 can pay less per click than a competitor with a score of 4, while still appearing in a higher position. The inverse is also true — low quality scores force you to bid higher just to stay competitive.
If you want to understand how this interacts with your overall cost per click, this breakdown of how to reduce Google Ads cost per click is worth reading alongside this article.
The financial implication compounds over time. A campaign running for months with below-average quality scores accumulates inflated costs that are difficult to recover from quickly, because quality score changes gradually as new data accrues.
What Actually Improves Quality Score
Most guides repeat the same surface-level advice. Here is what we found actually works — and what doesn't.
Restructure Before You Rewrite
Rewriting ad copy is the instinctive response to a low quality score, but it's often the wrong starting point. Account structure — specifically how keywords are grouped relative to ads and landing pages — has a more fundamental effect. Before touching copy, audit whether your ad groups have too many loosely related keywords. If a single ad group contains queries spanning different user intents, no amount of copywriting will fix the ad relevance component.
Landing Pages Are Usually the Biggest Lever
In our experience, landing page experience is consistently the most underinvested component. Advertisers will spend hours testing ad headlines while leaving a slow, generic landing page untouched. Google's PageSpeed Insights score directly correlates with this component — anything below 50 on mobile is worth addressing before anything else. The content on the page also needs to mirror the specific promise made in the ad, not just the general topic.
Don't Chase the Score Directly
Here is an insight that rarely appears in standard guides: optimising directly for quality score as a vanity metric tends to produce worse outcomes than optimising for genuine user relevance. Accounts that focus on making ads and landing pages genuinely useful to searchers almost always see quality score improve as a byproduct. The reverse — making cosmetic changes to try to move the number — rarely holds.
For SMEs thinking about how AI-driven management handles this in practice, see how Overtime works — particularly how it monitors keyword-level signals rather than treating quality score as a campaign-level aggregate.
Pause, Don't Delete, Underperforming Keywords
Keywords with persistent Below Average ratings drag the account's overall health without necessarily surfacing in top-line reporting. Pausing them rather than deleting preserves historical data, which matters if you later want to diagnose patterns. This is the kind of operational detail that gets overlooked when accounts aren't reviewed systematically.
For context on how automated bid management interacts with keyword health, automated bid management vs manual bidding strategies covers the trade-offs in detail.
What Quality Score Doesn't Tell You
Quality score is not a measure of campaign profitability. A keyword can score 10 and still generate no conversions if it attracts the wrong audience. Conversely, some high-intent, low-competition keywords score modestly because there's limited historical data, but they convert well.
It also doesn't reflect your position relative to the broader competitive landscape in any meaningful granular way. Two advertisers can both have a quality score of 6 on the same keyword and face completely different competitive dynamics depending on their bids, geography, and audience targeting.
The metric is most useful as a diagnostic flag, not a performance target. If multiple keywords in an ad group are scoring 4 or below, that's a signal to investigate structure, copy, and landing page alignment — not to bid higher to compensate.
How AI-Managed Accounts Handle Quality Score in 2026
Managing quality score improvements manually across an account with dozens of campaigns is genuinely time-consuming. It requires consistent monitoring at the keyword level, which most SMEs running Google Ads in-house don't have capacity for. The monitoring tends to slip, and Below Average ratings accumulate quietly while spend continues.
Overtime, an AI agent that manages Google Ads for SMEs, monitors keyword-level quality signals as part of its ongoing account management. It identifies keywords with persistent Below Average ratings, flags landing page experience issues, and sends account summaries that surface these problems before they become expensive. Rather than treating quality score as a periodic review item, it becomes part of continuous account oversight.
If you're weighing up what active Google Ads management actually involves day-to-day, what a Google Ads expert actually does is a useful reference point — and it puts the quality score work in the context of broader account management.
For SMEs considering their options more broadly, AI-powered PPC management for small businesses covers how automated management compares to the traditional agency or freelancer model.
The Practical Starting Point for Quality Score
If your quality score is underperforming, the most useful thing you can do today is pull a keyword report filtered to show the three sub-component ratings — not just the overall score. Sort by Below Average on landing page experience first, then ad relevance. Those are the most actionable starting points. Expected CTR is harder to move quickly because it's historically weighted, but the other two components respond to structural and creative changes within weeks.
For a broader view of how quality score fits into your overall Google Ads cost and performance picture, how much Google Ads costs for SMEs is worth reading alongside this — the connection between quality score and effective CPC is often where the biggest savings sit.
If managing this level of detail consistently is the challenge rather than understanding it, explore what Overtime manages on your behalf — including keyword-level quality score monitoring, bid adjustments, and regular account summaries.
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FAQ
What is a good quality score in Google Ads?
A quality score of 7 or above is generally considered healthy and indicates reasonable alignment between your keywords, ads, and landing pages. Scores of 8–10 typically result in lower costs per click due to the Ad Rank advantage they provide. Scores of 3 or below usually signal a structural problem worth investigating urgently.
How does quality score affect cost per click?
Quality score influences Ad Rank, which determines both your ad position and the price you pay per click. A higher quality score means you can achieve competitive ad positions at a lower bid, effectively reducing your cost per click. Advertisers with low quality scores pay a premium to remain competitive in the same auction.
Why is my quality score low despite high CTR?
A high click-through rate addresses only one of three quality score components. If your landing page experience or ad relevance ratings are Below Average, the overall score will still be low. This often happens when ads drive clicks but the landing page doesn't match the specific promise or intent of the ad.
Should I delete keywords with a low quality score?
Pausing is generally preferable to deleting. Deleted keywords lose their historical data, which can be useful for diagnosing account patterns over time. Pause keywords with persistent Below Average ratings, investigate the root cause across the three sub-components, and address the structural issue rather than simply removing the symptom.
Do quality score improvements happen immediately?
No. Quality score is calculated using historical data, so improvements to ad copy and landing pages take time to be reflected in the score as new clicks and impressions accumulate. Landing page experience changes can begin influencing the score within a few weeks, but expected CTR in particular is slow to shift because it's weighted against a longer historical baseline.