Quality Score is a rating from 1 to 10 that Google Ads gives each keyword in a search campaign. It estimates how relevant your ad and landing page are to someone searching that keyword, compared with other advertisers bidding on it. The score itself is a diagnostic: it does not decide whether your ad shows, where, or what you pay, but it points to the factors that the auction’s own quality estimates also reflect. Microsoft Advertising shows a similar keyword quality score; this entry focuses on Google’s, which is the one most people mean.
At a glance
- Quality Score is a 1 to 10 keyword-level rating in Google Ads, built from expected click-through rate, ad relevance and landing page experience.
- Google calls it a diagnostic tool: the displayed score does not set ad eligibility, position or cost per click.
- The auction uses real-time quality estimates; improving the underlying factors may improve them, but results vary by keyword and competition.
- It does not measure conversions, revenue or lead quality.
- Landing pages are part of the score, so website speed and content matter, not only ad copy.
What problem it solves
Search ads are sold by auction, but the highest bid does not automatically win. Google’s auction also weighs its real-time estimates of ad quality. Those estimates aren’t shown to advertisers, so Quality Score gives a simple, after-the-fact view of how Google rates the relevance of each keyword’s ads and landing page, and which part is weakest.
For a business buying paid search, directly or through an agency, it is a check on whether budget is going to well-matched ads or being spent on loosely related searches. Two companies bidding on the same keyword can pay quite different prices for the same position, partly because the auction’s quality estimates differ; a low displayed score is a sign of where those estimates may be weak.
How it works
Each keyword with enough search volume gets a score from 1 to 10, based on three parts:
- Expected click-through rate. How likely your ad is to be clicked when shown for that keyword, adjusted for things like ad position.
- Ad relevance. How closely the ad’s message matches the intent behind the search.
- Landing page experience. Whether the page people land on is relevant, useful, easy to use on mobile and quick to load.
Each part is rated above average, average or below average compared with other advertisers who showed ads for the same keyword. The overall score summarizes those ratings.
At auction time, Google ranks ads using Ad Rank, which combines the bid, real-time estimates of ad quality, minimum thresholds, the context of the search and the expected effect of extras such as sitelinks. Quality Score is not plugged into that calculation directly; it is a summary of the same kinds of signals, averaged over past auctions. That is why older descriptions that say “Ad Rank equals bid times Quality Score” are an oversimplification.
Common ways to improve the underlying factors include grouping closely related keywords together, writing ads that echo the search wording, sending each group to a matching landing page rather than the home page, and making pages fast and clear on mobile.
When it matters for buyers
- When reviewing an agency or in-house team. Ask for Quality Score distribution and the weakest component across your main keywords. Persistent below-average landing page ratings point to website work, not ad work.
- When cost per click keeps rising. Weak relevance, which a low score can point to, is one possible cause, alongside more competition and broader keyword matching.
- When connecting ads to sales. Quality Score stops at the click. Tie campaigns to your customer relationship management (CRM) system so you can see which keywords produce qualified opportunities and real return on investment.
- When buyers research before contacting you. Paid search is one way to show up during the zero moment of truth, when prospects compare options online. A customer journey map shows where paid search fits alongside other touchpoints.
Questions to ask vendors
These are questions for an agency or consultant running paid search for you:
- What is the Quality Score distribution across our highest-spend keywords, and which component is weakest?
- Which landing pages do our main ad groups send traffic to, and how do they score on mobile speed and relevance?
- How do you balance Quality Score against conversions and cost per qualified lead?
- How are conversions tracked back to our CRM, and can we see results by keyword?
- How often do you review search terms and add negative keywords to cut irrelevant clicks?
- What changes would you make first, and how will we know whether they worked?
How it differs from a contact center quality score
In a contact center, “quality score” usually means something else: the result of a quality assurance review, where a supervisor or software grades a call or chat against a scorecard for accuracy, compliance and tone. That score measures how well an agent handled a conversation. Google Ads Quality Score measures how relevant an ad, keyword and landing page are to a search. They share a name, but nothing else. Neither should be confused with quality of service (QoS), which is a networking technique for prioritizing traffic such as voice.