Google Ads Quality Score: How to Improve It and Lower Your CPC

Google Ads Quality Score is a diagnostic metric — rated from 1 to 10 at the keyword level — that reflects how relevant your ads, keywords, and landing pages are to the users searching for those terms. A higher Quality Score results in better Ad Rank and lower cost-per-click, meaning well-optimised advertisers achieve higher positions in search results while paying less than competitors with lower scores. Understanding how Quality Score is calculated and where to improve it is one of the most impactful optimisation tasks in any Google Ads account.

How Quality Score Is Calculated

Google does not publish the exact algorithm behind Quality Score, but confirms it is composed of three measurable components:

• Expected click-through rate (CTR): How likely your ad is to be clicked when shown for a given search query, based on historical data and predicted performance. This is the most heavily weighted component.
• Ad relevance: How closely your ad copy matches the intent of the search query. Ads that mirror the language and subject of the search term earn higher relevance scores.
• Landing page experience: How useful and relevant your landing page is to users who click your ad. Google evaluates factors including content relevance, page speed, mobile usability, and ease of navigation.

Each component is rated as “Above Average,” “Average,” or “Below Average.” Quality Score at the keyword level is a snapshot of performance relative to other advertisers targeting the same keyword. A score of 7 or above is generally considered healthy; scores of 3 or below indicate significant relevance problems that are actively raising your CPC.

How Quality Score Affects Ad Rank and CPC

Ad Rank determines which ads appear and in what position in a Google search results page. Ad Rank is calculated from your bid multiplied by your Quality Score (along with additional factors such as auction context and expected ad extension impact). This means:

• A high Quality Score with a moderate bid can outrank a low Quality Score with a higher bid
• Your actual CPC is determined by the Ad Rank of the advertiser below you divided by your Quality Score, plus a minimum increment — meaning higher Quality Scores directly reduce what you pay per click

In practical terms, improving a keyword’s Quality Score from 4 to 8 can reduce your effective CPC significantly while maintaining or improving position. The cumulative effect across an account with many keywords compounds into meaningful cost savings.

How to Improve Expected Click-Through Rate

Expected CTR is evaluated at the keyword level based on the match between your ad copy and the search query. Steps to improve it:

• Include the exact keyword in your headline: Ads that mirror the search term in the first headline consistently achieve higher CTR. Use dynamic keyword insertion ({KeyWord:}) where relevant, with a fallback headline for terms that would produce awkward phrasing.
• Write benefit-led headlines: Highlight the specific value proposition relevant to that search term, not generic agency claims.
• Use all available ad extensions: Sitelinks, callouts, structured snippets, and call extensions all expand your ad’s footprint on the results page and improve overall CTR. Extensions do not directly affect Quality Score but do improve Ad Rank.
• Test ad copy variants: Run two to three responsive search ad variants per ad group. Evaluate CTR per variant after accumulating sufficient impressions and pause underperformers.

How to Improve Ad Relevance

Ad relevance measures how closely your ad matches the intent of the keywords in that ad group. Poor ad relevance typically stems from ad groups that contain too many different keyword themes:

• Tighten ad group structure: Each ad group should contain keywords that share the same intent and subject. An ad group mixing “google ads agency,” “ppc management company,” and “paid search services” is manageable. One mixing these terms with “seo services” and “social media management” will have low ad relevance across all keywords.
• Write ad copy specific to each ad group’s theme: Generic ads that could apply to any query in your account will score below average for relevance on specific terms.
• Use SKAGs (Single Keyword Ad Groups) for your highest-value terms: For keywords that represent the bulk of your conversion volume, a dedicated ad group with ads written specifically for that keyword achieves maximum relevance.

How to Improve Landing Page Experience

Google evaluates landing page experience based on what it can assess about user experience after the click. Key factors include:

• Content relevance: The landing page should address the intent of the keyword directly. A user who searched “google ads management services” and lands on a generic homepage will have a higher bounce rate and poorer experience signal than one who lands on a dedicated Google Ads service page.
• Page speed: Slow-loading pages increase bounce rates and send negative experience signals. Test your landing pages with Google’s PageSpeed Insights and prioritise Core Web Vitals improvements.
• Mobile usability: A significant proportion of ad clicks occur on mobile devices. Landing pages that are not mobile-optimised will receive below-average experience ratings regardless of desktop performance.
• Clear and relevant call to action: Pages that make it easy for users to take the next step (contact form, phone number, booking link) perform better than pages with buried or unclear conversion paths.
• Transparency and trustworthiness: Pages without contact information, legal notices, or identifiable business details score lower on Google’s experience assessment.

Where to Find and Monitor Quality Score Data

Quality Score is visible in Google Ads at the keyword level. Add the Quality Score, Expected CTR, Ad Relevance, and Landing Page Experience columns to your keyword view. Review these alongside your CPC data regularly to identify keywords where poor Quality Score is actively inflating your costs.

Prioritise Quality Score improvements on your highest-spend keywords first — the cost reduction impact is greatest where your spend is concentrated.

Tag Your Ad Traffic for Full-Funnel Tracking

Quality Score improvements reduce CPC, but confirming their impact on downstream conversion metrics requires accurate attribution. Make sure every ad URL carries UTM parameters so improvements in CPC translate to measurable cost-per-conversion reductions in your analytics.

Build your campaign tracking URLs above before running any tests. For a full overview of professional Google Ads account management, see our guide on Google Ads management services. To understand how Quality Score fits within broader paid search strategy, our article on what is PPC advertising covers the core mechanics. Our digital marketing services page outlines how Nexsage manages Google Ads optimisation for clients at different stages of account maturity.

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