Google Ads Quality Score: What It Is and Why It Directly Affects Your Cost Per Click
Quality Score is a 1-10 rating Google assigns to each keyword in your account. It determines how much you pay per click and where your ad appears in the results.Most business owners think Google Ads is a bidding war. Spend more, show higher. That's not how it works. Google runs a relevance auction, not a price auction. Two advertisers bidding exactly the same amount for the same keyword will pay different prices and appear in different positions, based on how relevant their ads and landing pages are to the person searching.
That relevance score is Quality Score. Understanding it is one of the highest-leverage improvements available to any Google Ads account.
What Quality Score Measures
Quality Score is calculated at the keyword level from three components:
Expected click-through rate. How likely is someone to click your ad when that keyword is searched? Google estimates this based on your ad's historical performance and benchmarks it against other advertisers targeting the same term. If your headline doesn't match what the searcher is looking for, expected CTR drops. Ad relevance. How closely does your ad copy match the intent behind the keyword? A landscaping business bidding on "lawn mowing Adelaide" with an ad that leads with garden design services will score poorly on relevance, even though the two services are related. Landing page experience. Does the page your ad sends traffic to match what the searcher expected? Google assesses relevance, transparency, ease of navigation, and mobile load speed. Sending all your ads to the homepage is the most common cause of a below-average landing page score.Each component is rated "Above average", "Average", or "Below average". The combination produces a score from 1 to 10 per keyword, visible in your Google Ads account under the keyword performance columns.
The Direct Financial Impact
Quality Score feeds into Ad Rank, the formula Google uses to determine both your position and your actual cost per click (CPC). The simplified version:
Ad Rank = Bid x Quality Score x Context signalsA higher Ad Rank means a better position and a lower CPC. Critically, a competitor with a lower bid but a higher Quality Score can outrank you and pay less per click at the same time.
Here is what that looks like in practice for an Adelaide business with a $3,000/month Google Ads budget, bidding on the same keyword:
| Quality Score | Approx. avg CPC | Clicks per month |
|---|---|---|
| 4 (below average) | $12 | 250 |
| 6 (average) | $8 | 375 |
| 8 (above average) | $6 | 500 |
Same budget. Same keyword. The business with a Quality Score of 8 gets twice the traffic of the business with a Quality Score of 4 -- not by spending more, but by being more relevant.
Over 12 months, that gap compounds to thousands of extra clicks that were always available in the auction but inaccessible because of poor account structure.
Three Mistakes That Tank Quality Score
The same structural problems appear in most Australian SME Google Ads accounts that are underperforming.
Sending all traffic to the homepage. The homepage is designed for everyone. An ad for "commercial refrigeration repair Melbourne" sending traffic to a homepage that also covers residential appliances, installations, and maintenance will score poorly on landing page experience. The fix is a dedicated page for each service or campaign theme, with content that directly matches the ad. One ad group covering too many keywords. When 15 different keywords share the same two ads, the ads are written broadly enough to cover all of them and closely match none of them. Tightly grouped ad groups -- sometimes two or three keywords per group -- make it possible to write ad copy that precisely mirrors the searcher's intent, which directly improves expected CTR and ad relevance. Generic headlines. A headline like "Professional Services in Adelaide | Call Now" could describe almost any business. A headline like "Commercial Refrigeration Repair | Same-Day Adelaide Service" answers the exact question the searcher typed. Expected CTR responds to specificity.What a Good Quality Score Looks Like
Google's benchmarks by score range:
- 7 to 10: Above average. You receive a discount on your CPC relative to competitors with lower scores.
- 5 to 6: Average. No penalty, no reward. You're competitive but leaving efficiency on the table.
- 1 to 4: Below average. You're paying a premium on every click. At score 1 or 2, your ads may not show at all even when your bid is competitive.
How to Improve Quality Score
Improving Quality Score means tightening the connection between keyword, ad, and landing page. Every step in that chain needs to answer the same question the searcher asked.
Restructure ad groups by intent. Group keywords by what the searcher is actually trying to do, not just by topic. "affordable bookkeeper Adelaide", "bookkeeper Adelaide prices", and "how much does a bookkeeper cost Adelaide" all share the same intent and belong together. "Xero bookkeeper Adelaide" serves a different searcher and belongs in its own group with tailored ad copy. Write ads that mirror the keyword. Include the primary keyword phrase in at least one headline. Address the specific intent behind the search rather than restating your general value proposition. "Fixed-Fee Bookkeeping from $295/month" answers a cost question. "Expert Bookkeeping Services | Call Us" doesn't. Build dedicated landing pages. One page per service or per intent cluster. The page should use the same language as the ad, directly answer the searcher's most likely questions, and make the next step -- call, form, quote request -- easy to find above the fold. Check page speed. Google includes load time in its landing page experience assessment. A page taking more than three seconds to load on mobile is scoring below average before a human reads a single word. Google's PageSpeed Insights (free) gives specific fixes with estimated impact.Quality Score Is a Diagnostic, Not a Target
Chasing a score of 10 on every keyword is not the goal. The goal is more leads from the same budget. Quality Score tells you where relevance is breaking down -- between the keyword, the ad, and the page. Fix those alignment gaps and your cost per click drops, your position improves, and more of your budget reaches people likely to convert.
An account with above-average Quality Scores across its core keywords is, in effect, getting a discount on traffic that competitors in the same market are paying full price for. That advantage compounds with every click.
For an independent look at what's dragging Quality Score down in your account, see the common causes in our Google Ads troubleshooting guide and the post-click gap breakdown that explains where budget disappears after the click.
FAQ
What is a good Quality Score for Google Ads in Australia?
A Quality Score of 7 or above is considered above average and earns you a discount on CPC relative to competitors. A score of 5 or 6 is average -- competitive but not efficient. Anything below 5 means you are paying a premium on every click because Google is penalising the mismatch between your keyword, ad, and landing page. For most lead-generation businesses in Australia, a well-managed account keeps core commercial keywords at 7 to 9.
Does Quality Score affect whether your ad shows at all?
Yes. At scores of 1 or 2, your ad may be excluded from auctions entirely, regardless of your bid. Google's priority is the searcher experience. If your ad does not closely answer the searcher's query, Google will show a competitor's more relevant ad even at a lower bid. This is why very low Quality Scores are not a minor inefficiency -- they can make your ads invisible on your most important keywords.
How quickly does Quality Score change after you fix the problems?
Ad relevance changes can reflect in Quality Score within a few days. Landing page improvements typically take one to two weeks to be re-evaluated. Structural changes -- rebuilding ad groups, creating dedicated landing pages -- take longer to implement but produce the most significant and durable improvements. Expected CTR changes slowly because it incorporates historical data, so a newly restructured campaign may not show its full Quality Score improvement for four to six weeks.
Is Quality Score the same as Ad Rank?
No. Quality Score is one input into Ad Rank, along with your bid and contextual signals like the searcher's location, device, and time of day. Ad Rank is recalculated in every single auction. Quality Score is a diagnostic indicator updated periodically that tells you how Google assesses your keyword-ad-page alignment. Two ads with the same Quality Score can have different Ad Ranks in different auctions depending on bid and context.
Written by the Dream Outcome Team. Dream Outcome is a Google-certified digital marketing agency based in Adelaide, South Australia, specialising in Google Ads management, Meta Ads, and revenue attribution for SME lead-generation businesses. As of June 2026, Dream Outcome manages Google Ads accounts across retail, trades, professional services, and B2B sectors.