Quality ScoreA diagnostic, not a target

What Quality Score is, and what it is not#

Quality Score is Google's simplified report card for a keyword. It compares your ads and landing pages with those of other advertisers who have shown ads for the same keyword, and expresses the result on a scale from 1 to 10. A higher score suggests that your ads are relevant and your pages useful, which tends to mean you pay less for the same position.

What it is not is the number the auction uses. Google calculates quality in real time for every auction, using far more signals than the three components it reports, including the device, the location, the time and the exact query. Quality Score is a summary of those calculations at keyword level. Treat it as a thermometer, not as the thermostat.

The three components#

Google reports each component as below average, average or above average. Those labels are more useful than the overall number, because they tell you where the problem lives.

Expected click-through rate

This estimates how likely your ad is to be clicked when shown for the keyword, adjusted for factors such as ad position so that you are compared fairly. It is the component most affected by the strength of your headlines and by whether the keyword attracts the kind of searcher your ad speaks to.

Ad relevance

This measures how closely your ad's message matches the intent behind the keyword. It usually suffers when one ad group contains too many different themes, so a single ad has to answer questions it was not written for.

Landing page experience

This estimates how relevant and useful your page is to someone who clicks. Relevance of content, clarity, ease of navigation, transparency about the business and how well the page works on mobile all matter. Our guide to PPC landing pages covers what good looks like.

Why it affects what you pay#

Google ranks ads by combining bid with quality and other factors. If your ad is judged more useful, you can reach the same position with a lower bid, or a better position with the same bid. The actual price you pay for a click is set by what you need to hold your rank, so quality acts as a discount on every click you buy.

This is also why Quality Score is easy to misread. A keyword can carry a modest score and still be your most profitable, because the searchers it attracts convert well. Another can score highly and lose money. Profit, not the score, is the goal.

Chase the searcher's satisfaction and the score follows; chase the score and you may lose the searcher.

Reading the score without fooling yourself#

Add the Quality Score columns and the three component columns to your keyword view, then sort by spend. Low scores on keywords that spend little are rarely worth your time. Low scores on keywords that carry a large share of spend are where the money is.

A score shown as a dash or null simply means there is not enough data yet. Do not restructure an ad group on the strength of a handful of impressions.

How to improve each component#

• Low expected CTR: test headlines that repeat the searcher's language, make the offer explicit, and use relevant assets. Check that the keyword itself is not attracting browsers you do not want; sometimes the fix is a negative keyword, not a better ad.
• Low ad relevance: split ad groups that mix intents. If a group holds both 'emergency plumber' and 'bathroom renovation', no single ad can answer both well.
• Low landing page experience: send each ad group to the page that most directly answers its query, make the main answer visible without scrolling on mobile, and fix load speed. A page that is useful to people tends to be judged useful.

Quality Score in an automated account#

As more spend moves into broad match, smart bidding and campaign types that do not use keywords at all, Quality Score covers less of the account. The underlying principle has not changed. Google still rewards ads that people want to click and pages that satisfy them, whether or not a number is shown.

That makes the old habits more important, not less: tight themes, honest ads, focused pages and regular reviews of the queries you paid for. The negative keywords guide is the companion piece.

An illustration of why it pays#

Illustration only, with deliberately simple numbers: imagine two advertisers competing for the same keyword with the same budget. One has a focused ad group, an ad that mirrors the search and a page that answers it in the first screen. The other sends the same traffic to a generic homepage with a broad ad.

The first advertiser is likely to pay less for each click at a given position, because quality lowers the price needed to hold rank. They are also likely to convert more of those clicks, because the page answers the question. The two effects multiply: a cheaper click and a higher conversion rate together reduce cost per acquisition more than either alone.

That multiplication is the real reason to care about quality. It is not the score that saves money; it is the relevance the score is trying to describe.

A practical routine#

Once a month, sort keywords by spend, look at the three components for the top slice, and pick one fix per problem: a split, a headline test or a page change. Record what you changed. After a few weeks, check whether cost per click and conversion rate moved, not just whether the score did. If you are auditing a whole account, our PPC audit checklist puts this in context.

Published by Fabulous.Media, a network of specialist marketing agencies. Updated 9 October 2026. Platform features change often; check current official documentation before acting on platform-specific detail.