Definition
Quality Score is Google Ads' 1–10 diagnostic rating of the relevance and expected performance of an ad, keyword, and landing page combination — used as a multiplier on bids in the auction, so higher Quality Score reduces effective CPC for the same ad position.
Quality Score is the most undervalued lever in Google Ads. It's a diagnostic, not a competitive ranking — it shows where your account is healthy and where it's leaking money. Three components feed it: expected click-through rate (CTR vs. competitors at the same position), ad relevance to the keyword, and landing-page experience.
The practical impact is large. A Quality Score of 8 on a keyword can pay 50% less per click than a Quality Score of 4 on the same keyword for the same position. Most accounts have a long tail of low-Quality-Score keywords paying invisible premiums; auditing and addressing them is consistently the highest-ROI optimisation work in a Google Ads account.
Origin
Introduced by Google in 2002 as part of the move from pure-bid auction to relevance-adjusted auction; the structure (3 component model) was made transparent to advertisers in 2013.
How it works
- Each keyword gets a Quality Score 1–10 with three components rated above-average / average / below-average.
- Expected CTR — does this ad get clicked at the rate Google predicts for its position?
- Ad relevance — does the ad match the keyword's intent?
- Landing page experience — is the landing page fast, mobile-friendly, and relevant?
- Higher Quality Score = lower CPC and better ad position at the same bid.
- Improving any component lifts the score; addressing the worst component first has the most leverage.
When to use it
Use when
- Always, on Google Ads. It's the single most-influential lever after audience and creative.
- Audit at the keyword level monthly; address the lowest-Quality-Score, highest-spend keywords first.
Skip when
- Quality Score is Google-specific. Meta, LinkedIn, and others have their own equivalents (Meta's Relevance Score, LinkedIn's Relevance Score) but the lever is the same idea: relevance reduces cost.
Key metrics
- Quality Score 1–10 per keyword.
- Component breakdown (which of the three is dragging it down).
- Account-weighted average Quality Score (advanced — requires custom calculation).
Examples
- Lifting Quality Score from 5 to 8 cut CPC by 35% on the same keyword.
- Quality Score is the lever most accounts ignore — and it's the cheapest one.
- We rebuilt the landing page; Quality Score climbed 4 points and CPA fell 28%.
In practice at Makreate
Makreate Google Ads management treats Quality Score as a primary lever — better creative, tighter ad groups, and faster landing pages compound into lower CPC. A recent client had 60% of their spend on keywords with QS ≤ 5; we restructured into tighter ad groups and shipped four campaign-specific landing pages. Account-weighted Quality Score climbed from 4.2 to 7.1; CPC fell 31% account-wide; same monthly spend produced 47% more leads.
Advertising →Common mistakes
- Bidding harder instead of fixing relevance.
- Ignoring landing-page experience. Slow pages hurt Quality Score even with great ads.
- Mega ad groups with too many keywords sharing one ad. The ad can't be relevant to all of them.
- Keyword stuffing in headlines. Helps Quality Score component but tanks CTR — net negative.
- Optimising Quality Score without watching CPA. Score for its own sake is a vanity number.
Frequently asked
What's a good Quality Score?
7 or higher is healthy. 8–10 means you're paying less than competitors at the same position. Below 5 is paying a premium.
How fast does Quality Score change?
Slow. Component changes take days; the overall score often stabilises over 2–4 weeks of new data. Don't change everything at once or you can't tell what worked.
Does Quality Score affect organic SEO?
No. Quality Score only affects paid Google Ads. Landing-page quality matters for both, but they're separate systems.