What Is Quality Score?

Quality Score is Google's rating of the relevance and quality of your keywords, ads, and landing pages. It's measured on a scale of 1 to 10 — with 10 being the highest — and is assigned at the keyword level. While Google has clarified that Quality Score is a diagnostic tool rather than a direct ranking input, it reflects the same signals that determine your Ad Rank.

In simple terms: a higher Quality Score means your ads are more relevant to users, which rewards you with better ad positions at a lower cost-per-click (CPC).

The Three Components of Quality Score

1. Expected Click-Through Rate (CTR)

This measures how likely your ad is to be clicked when it appears for a given keyword, compared to other advertisers. Google estimates this based on historical CTR data, adjusted for ad position. Writing compelling, relevant ad copy is the primary lever here.

2. Ad Relevance

Ad relevance measures how closely your ad copy matches the intent behind a user's search query. If someone searches "running shoes for flat feet" and your ad talks about general footwear, the relevance score will suffer. Tightly themed ad groups with keyword-specific ad copy are essential.

3. Landing Page Experience

Google evaluates whether the landing page you send visitors to is genuinely useful, relevant, and easy to navigate. Key factors include:

  • Content relevance to the search query and ad
  • Page load speed (especially on mobile)
  • Mobile-friendliness
  • Clear calls to action and transparent business information
  • Low bounce rate signals

How Quality Score Affects Ad Auction

Your Ad Rank is calculated using your bid, Quality Score components, expected impact of ad extensions, and auction-time context. A higher Quality Score can allow you to achieve a better position than a competitor bidding more but with lower-quality ads.

Additionally, your actual CPC is influenced by the formula: CPC = (Ad Rank of advertiser below you / Your Quality Score) + $0.01. A strong Quality Score means you pay less for the same position.

How to Diagnose a Low Quality Score

In Google Ads, you can view Quality Score and its three sub-components (each rated as "Above average," "Average," or "Below average") at the keyword level. Start with keywords marked "Below average" in any component and prioritize fixing the most impactful issues first.

Actionable Ways to Improve Your Quality Score

Improve Expected CTR

  • Use numbers, questions, or power words in headlines.
  • Include the keyword naturally in your headline and description.
  • Add relevant ad extensions (sitelinks, callouts, structured snippets) to increase ad real estate.
  • Test multiple ad variations with responsive search ads.

Improve Ad Relevance

  • Break large ad groups into tightly themed, single-theme ad groups (STAGs).
  • Write ad copy that directly reflects the keyword and the user's likely intent.
  • Avoid mixing unrelated keywords in the same ad group.

Improve Landing Page Experience

  • Ensure the landing page content directly matches what the ad promises.
  • Improve page speed — use Google's PageSpeed Insights to identify bottlenecks.
  • Make sure the page is fully responsive on mobile devices.
  • Remove unnecessary friction: avoid aggressive pop-ups and make CTAs clear.

What Quality Score Is Not

It's worth being clear: Quality Score is a snapshot and a diagnostic, not a real-time bidding input. Google has emphasized that the actual auction uses similar but more granular signals. Don't obsess over the number itself — focus on the underlying quality of your ads and landing pages, and the score (and performance) will follow.

The Bottom Line

Improving Quality Score is fundamentally about aligning three things: what users search for, what your ads say, and what your landing pages deliver. Close those gaps, and you'll pay less per click while earning better placement — a compounding advantage over time.