What Is Quality Score?
Quality Score is Google's 1–10 rating that estimates the overall relevance and quality of your keywords, ads, and landing pages. It's a critical factor in determining your Ad Rank — which controls both your ad position and how much you actually pay per click.
A higher Quality Score means Google considers your ad more relevant to the user's search, which rewards you with better placement at a lower cost. Conversely, a low score means you pay more for worse positions.
The Three Components of Quality Score
1. Expected Click-Through Rate (CTR)
Google predicts how likely your ad is to be clicked when shown for a given keyword, based on historical performance and the relationship between your ad copy and the keyword. Ads that closely match search intent and use compelling calls to action score higher here.
2. Ad Relevance
This measures how closely your ad copy matches the intent behind a keyword. If someone searches for "emergency plumber London" and your ad says "Find a Plumber Near You," relevance is low. Your ad should reflect the specific language and intent of the search query.
3. Landing Page Experience
Google evaluates whether your landing page delivers on the promise of your ad. Key factors include:
- Page load speed (especially on mobile)
- Content relevance to the keyword and ad
- Ease of navigation and clarity of the offer
- Transparency (clear business information, privacy policy)
How Quality Score Affects Your Costs
Your actual cost per click is calculated using this formula:
Actual CPC = (Ad Rank of competitor below you ÷ Your Quality Score) + $0.01
In practice, this means a well-optimised advertiser with a Quality Score of 8 can outrank a competitor with a higher bid but a Quality Score of 4 — and pay significantly less per click for the privilege.
| Quality Score | CPC Impact | Ad Position Impact |
|---|---|---|
| 8–10 | Lower CPC (discount applies) | Premium positions accessible |
| 5–7 | Average market rate | Mid-tier positions |
| 1–4 | Higher CPC (penalty applies) | Poor positions or ads rarely shown |
Practical Ways to Improve Your Quality Score
Tighten Your Ad Groups
Use tightly themed ad groups with a small number of closely related keywords (5–15 per group). This makes it much easier to write ads that are highly relevant to every keyword in the group. Avoid dumping dozens of loosely related keywords into a single ad group.
Write Keyword-Rich Ad Copy
Include your primary keyword — naturally — in your headline and description. Use Google's Dynamic Keyword Insertion sparingly, and always prioritise readability over keyword stuffing.
Optimise Your Landing Pages
- Match the headline of your landing page to the promise in your ad
- Aim for page load times under 3 seconds
- Remove distractions — focus the page on one clear action
- Ensure mobile responsiveness
Use Negative Keywords
Irrelevant clicks drag down your CTR, which hurts your Quality Score over time. Regularly review your Search Terms report and add irrelevant queries as negative keywords to keep your CTR healthy.
Where to Check Your Quality Score
In Google Ads, navigate to Keywords → Columns → Modify Columns → Quality Score. You can view the overall score and individual component ratings (Above Average, Average, Below Average) for each keyword. Focus your optimisation efforts on keywords rated "Below Average" in any component.
Quality Score isn't a vanity metric — it's a direct lever on your profitability. Improving it consistently is one of the highest-ROI activities in any Google Ads account.