Google Ads does not simply give the top spot to the highest bidder. Each time someone searches, an auction compares ads using a score called Ad Rank, which combines your bid with the quality of your ad and landing page, among other things. Quality Score is a related but separate number: a diagnostic you can see, not the thing that decides the auction.
Ad Rank in plain terms
Google describes Ad Rank as what decides whether your ad is eligible to show and where it appears relative to other advertisers. It is calculated again for every search. The factors Google lists are:
- Your bid: the most you are willing to pay for a click. Your actual cost is often lower.
- Ad and landing page quality: how useful and relevant your ad and its landing page are to the searcher.
- Ad Rank thresholds: minimum scores needed to be eligible, and to appear in higher positions.
- Auction competitiveness: ads with similar Ad Ranks have similar chances, and a bigger gap favours the higher-ranked ad.
- Search context: the search terms, location, device, time of day, and other ads and results on the page.
- Expected impact of ad assets and formats: the estimated effect of extras such as sitelinks.
The useful insight is that bid is only one of several inputs. A well-matched ad pointing to a useful page can beat a higher bid, and Google notes that higher quality can lower your cost per click.
What Quality Score is, and is not
Google’s page on Quality Score says it is a 1 to 10 diagnostic score, set per keyword, estimating how well your ads and landing pages match what people search for compared with other advertisers. It has three components:
| Component | What it asks |
|---|---|
| Expected click-through rate | How likely is your ad to be clicked when shown? |
| Ad relevance | How closely does your ad match the intent behind the search? |
| Landing page experience | How useful and relevant is the page to people who click? |
Each component is rated above average, average or below average, compared with other advertisers whose ads showed for the same search over the last 90 days.
The key point, stated directly by Google: “Quality Score is not an input in the ad auction.” It is a summary to guide your improvements. The auction itself uses auction-time quality measures, calculated for each search. So chasing a 10 out of 10 is not the goal. Improving the components that are rated average or below average is.
Landing page experience: where most gains hide
Of the three components, the landing page is the one you fully control without touching your ads. A page tends to rate well when it:
- Matches the promise of the ad. If the ad mentions a service, the page should open with that service.
- Is easy to use. Clear headline, obvious next step, readable on a phone.
- Loads quickly. Speed is part of usefulness. See our guide to Core Web Vitals for business.
- States what you do honestly, with contact details and the information a buyer needs.
We cover page design in more depth in landing pages that turn campaign traffic into enquiries.
A diagnostic routine
- Find keywords with high spend and a below average component.
- If expected click-through rate is weak, test headlines and descriptions that speak to the search terms people use.
- If ad relevance is weak, split broad ad groups so each ad speaks to one theme.
- If landing page experience is weak, review the page for message match, usability and speed before changing anything else.
- Change one thing at a time and give it enough traffic to judge. Note that ratings compare you with other advertisers, so they can move even when you change nothing.
Misconceptions to avoid
- “Quality Score decides the auction.” Google says it does not.
- “A bigger bid always wins.” Bid is one factor among several.
- “A high score means more sales.” Quality Score says nothing about whether the click turns into a customer. Conversions come from tracking and offer, not the score. Our article on building a digital marketing strategy places paid search within a wider plan.
Google’s definitions can change, so check the current help pages before making decisions based on exact wording.
Where Radiance Impact fits
Radiance Impact’s Growth and Marketing division works on search visibility, campaigns and strategy, and its Technology division builds landing pages and business websites. To talk through a campaign or page, see Growth or contact us.
Sources
- About Ad Rank, Google Ads Help
- About Quality Score for Search campaigns, Google Ads Help
