Quality Score is a rating from 1 to 10 that Google Ads gives each keyword in a search campaign, showing how relevant and useful your ads and landing pages are compared with other advertisers on the same keyword. It is a diagnostic tool: a summary of past performance that helps you find weak spots, not a figure used directly in the auction.
How Quality Score works
Google builds the score from three components, each rated Above average, Average or Below average:
- Expected click-through rate: how likely your ad is to be clicked when it shows for that keyword, with the effect of position and similar factors removed.
- Ad relevance: how closely the ad matches the intent behind the searches that trigger it.
- Landing page experience: how relevant, clear and usable the page is for people who click, including on mobile.
The score appears in the keywords report once you add the Quality Score columns. Keywords without enough recent searches show a dash instead of a number. Historical columns let you see how the score and each component have moved over time, which is useful after a change.
In the live auction, Google uses its real-time estimate of quality for that particular search, together with your bid and other factors, to work out Ad Rank. Quality Score is the averaged, simplified view of those estimates that Google lets you see.
One detail surprises people. Google calculates the score from past searches that exactly match the keyword, even when the keyword is set to broad or phrase match. A broad keyword can therefore show a respectable score while many of the searches it actually triggers are poorly matched, which is why the search terms report belongs next to Quality Score in any review.
Why it matters
Better quality usually means a better position for less money. Two advertisers bidding the same amount will not get the same result if one has a sharply relevant ad and a fast, focused page while the other sends everyone to a generic homepage. Across a year, that gap can decide whether search advertising is affordable for a small business at all.
It is especially useful for working out why costs are high. A Manchester law firm paying heavily for personal injury searches can look at the three components and see whether the problem is the ad, the landing page, or simply that the keyword attracts searches the firm does not serve.
What it is not is a target. Quality Score is reported only for keywords in search campaigns, and it says nothing about whether clicks become customers. A keyword scoring 4 that brings in profitable work is worth more than one scoring 9 that brings in nothing.
Common mistakes
- Chasing a higher number for its own sake, or reporting it as a measure of success.
- Pausing low-scoring keywords that convert well.
- Writing one generic ad for an ad group full of unrelated keywords, which drags ad relevance down across the group.
- Ignoring landing page experience because it feels like a website job, when it is often the weakest of the three.
- Reading scores on keywords with tiny volumes, where the figure rests on very little data.
- Expecting the score to move the day after an edit. It updates as new searches come in, so give it time.
How to act on it
Add the Quality Score, Exp. CTR, Ad relevance and Landing page exp. columns to your keywords view, then sort by cost. Start with the keywords that spend the most, because that is where improvements pay back fastest.
- Below average expected CTR: make the headline answer the search directly, add assets and test a clearer offer.
- Below average ad relevance: split broad ad groups into tighter themes so each ad can reflect its keywords naturally.
- Below average landing page experience: send clicks to the page that matches the search, make it fast on mobile and put the answer near the top. My landing page checklist covers the details.
Working through these three components is routine in my search ads management, and it usually starts with account structure rather than bids.