Quality Score is one of the most misunderstood metrics in Google Ads. Improving it can reduce your cost per click by 20 to 50 percent. Ignoring it means paying more for the same positions than competitors who have built better campaigns, every single day.
What Quality Score is
Quality Score is a 1 to 10 rating that Google assigns to each keyword in your account. It measures how relevant your ad and landing page are to someone who searched the keyword that triggered your ad. Higher Quality Score means lower cost per click for the same ad position. A score of 8 will pay less for position 2 than a competitor with a score of 4, even if that competitor is bidding more.
The three components
- Expected click-through rate: how often people click your ad compared to other ads showing for the same searches
- Ad relevance: how closely your ad copy matches the intent of the search query
- Landing page experience: how relevant and useful the landing page is for someone who clicked the ad
All three are assessed relative to other advertisers competing for the same searches, not on an absolute scale. Improving any one of them improves your overall score.
Why it matters for what you pay
Google calculates ad position using a formula called Ad Rank, which combines your bid with your Quality Score. A high Quality Score can place your ad above a competitor who is bidding significantly more. A low Quality Score means you pay more for lower positions. The budget implications compound over months of spend into a material cost difference.
How to improve expected click-through rate
Write headlines that match the search closely. Use ad extensions including sitelinks, callouts, and call extensions to make your ads more prominent. Test multiple ad variations and retire those that consistently underperform. A small improvement in click-through rate on a high-volume keyword has an outsized effect on overall campaign efficiency.
How to improve ad relevance
Ad group structure is the primary lever here. Tight ad groups, each containing closely related keywords with ad copy that references those specific keywords, consistently outperform broad ad groups that cover many different search intents with generic copy. If your ad group contains 40 keywords about everything from loft conversions to bathroom renovations, no headline can match all of them well.
How to improve landing page experience
Page speed, mobile optimisation, and the relevance of page content to the search query all contribute. Google does not want users clicking an ad for 'luxury bathroom renovation London' and arriving at a page about kitchen renovations. The page should confirm, within the first visible section, that the visitor is in the right place for what they searched.
What to aim for
A Quality Score of 7 to 10 is good. 5 to 6 is average. Below 5 means you are paying a premium for every click. Focus improvement efforts first on keywords that have both high spend volume and low Quality Score, since those represent the largest cost saving available.
Every campaign Colonnade builds is structured around tight ad groups and dedicated landing pages specifically to support Quality Score from day one. See how Google Ads management for property businesses is structured in practice.
A well-structured campaign costs less per click.
Colonnade builds Google Ads campaigns around tight ad group structure and dedicated landing pages, which supports Quality Score from the first week.