Quality Score gets a lot of attention in Google Ads, and it is often misread. Owners see a 4 out of 10 next to a keyword and assume it is a grade on the whole account, or that raising it is the goal. Google's own documentation says otherwise on both counts. This guide explains what the score is, what Google says does and does not affect ad quality, and how a local service business can use it without chasing it.
Google describes Quality Score as a diagnostic tool, reported on a scale of 1 to 10 at the keyword level. It is built from three components, each rated above average, average or below average.
Expected clickthrough rate is the likelihood that your ad will be clicked when shown. Ad relevance is how closely your ad matches the intent behind a user's search. Landing page experience is how relevant and useful your landing page is to people who click your ad.
The ratings come from a comparison with other advertisers whose ads showed for the exact same search over the last 90 days. If you see a dash instead of a number, Google says there are not enough searches that exactly match your keyword to determine a score. For a business advertising niche services in a smaller market, a dash simply reflects low exact-match volume, not a defect.
Google is blunt that Quality Score is not an input in the ad auction. It is a way to identify how the ads shown for certain keywords affect the user experience. Google also says it is not a key performance indicator and should not be optimized or aggregated with the rest of your data.
Google adds that there is no such thing as an ad group, campaign or account-level Quality Score. A report that shows an account-wide average is aggregating a number Google says should not be aggregated.
Several common beliefs are contradicted on Google's own pages.
Changing match types does not change Quality Score, because the score is based on historical impressions for exact searches of the keyword.
Restructuring alone does nothing. Google says splitting keywords into fresh ad groups or campaigns does nothing for their quality unless the ad text or landing page changes too.
Bidding for a higher position does not raise it. Google says expected clickthrough rate is normalized for your actual position on the page, so you are free to bid for the clicks, conversions and costs that work for your business.
Your bid may affect Ad Rank, but Google says the amount you bid does not affect the assessment of your ad quality. Neither do your reported conversions.
Google also says the 1 to 10 number does not capture everything. It lists factors related to ad quality that might not be captured by Quality Score, including the device used for the search, the location of the user, the time of day and your ad assets.
Google suggests two uses. Look through your high-performing keywords and use Quality Score to spot which ones might do even better with changes to ads and landing pages. And use low scores and component ratings to find weaker patterns across the account, then set longer-term plans for improvement. The component ratings are more useful than the headline number, because each one points to a different fix.
If ad relevance is rated below average or average, Google suggests matching the language of your ad text more directly to search terms, splitting ad groups that contain many different keywords one ad cannot address, and grouping keywords into themes. For a roofing company, that means storm damage repair and new roof installation in separate ad groups, each with ads that speak to it.
If expected clickthrough rate lags, Google suggests making the offer more compelling, making sure the details in the ad match the intent of your keywords, highlighting a unique benefit, being more specific, and testing calls to action such as Get a Quote.
If landing page experience lags, Google's list is to give people what they are looking for, keep messaging consistent from ad to landing page, make the site mobile friendly and improve loading speed. It also suggests watching conversion rate as a stand-in for landing page experience while you work.
For a local service business, the number that matters is the cost of a real lead, measured through conversion tracking. Quality Score earns its place when it points to a specific weakness, such as an ad that does not match what people searched or a landing page that loads slowly on a phone. It is not something to report up the chain or celebrate for its own sake.
Vanguard Digital Marketing says on its website that every recommendation it makes comes with the reasoning behind it, and that is a fair standard for any advice about Quality Score: a proposed change should be explained by the component it fixes, not by the score it might raise.