What is Quality Score?
Quality Score is Google's rating system for your Google Ads campaigns, measured on a scale of 1 to 10. It evaluates three key components: expected click-through rate (CTR), ad relevance, and landing page experience. Google calculates this metric for each keyword in your account and updates it regularly based on performance data.
Why Quality Score Matters
Quality Score directly impacts your campaign economics. A higher score – typically 7 or above – results in lower cost-per-click (CPC) and better ad positions at auction. Conversely, low scores (1-3) mean you'll pay more for worse placements, making campaigns uneconomical. For UK agencies managing budgets across multiple sectors, Quality Score optimisation can deliver significant cost savings without reducing impression volume.
Google rewards advertisers who create relevant, useful experiences. This aligns with broader platform priorities: better ads benefit users, publishers, and Google's ecosystem.
The Three Components
Expected Click-Through Rate: Predicts likelihood users will click your ad, based on historical performance of similar keywords and ads.
Ad Relevance: Measures how closely your ad copy matches user search intent. Specific, keyword-matched ad copy performs better than generic messaging.
Landing Page Experience: Evaluates whether your destination page is relevant, loads quickly, and provides clear value. Mobile optimisation is essential here, particularly given UK mobile traffic patterns.
When and How It's Used
Quality Score applies across Search campaigns and Shopping ads. You'll see it reported at keyword level in Google Ads, though the system also calculates scores for ad groups and accounts.
Use Quality Score diagnostics to identify underperformers. Keywords with scores below 5 warrant review: refine ad copy, adjust keyword match types, or improve landing pages. For e-commerce clients, ensure product pages load quickly and clearly match search queries.
Practical Optimisation Tips
- Group keywords tightly: Create ad groups around single themes for higher ad relevance
- Test ad variations: Test multiple headlines and descriptions to improve CTR
- Optimise landing pages: Ensure fast load times, mobile responsiveness, and clear calls-to-action
- Negative keywords: Remove irrelevant traffic to improve CTR metrics
- Monitor regularly: Quality Score changes weekly; track trends to catch issues early
Limitations
Quality Score is diagnostic rather than a direct ranking factor in auctions. Ad Rank – determined by bid multiplied by Quality Score – drives placement. However, Quality Score improvements often signal stronger campaign fundamentals and typically correlate with better performance metrics like conversion rates and ROAS.