Google Ads Quality Score: The 3 Components and How to Fix It

Google Ads Quality Score is a 1-10 diagnostic rating that summarises how relevant your keyword, your ad copy and your landing page are compared with the other advertisers competing for the same search. It is not a dial you turn: to raise the score you do not optimise the score itself, you fix the three signals that feed it. The practical consequence is blunt. For the same ad position, a low-quality keyword simply pays more than a high-quality one.

What is Google Ads Quality Score?

Quality Score is an estimate from 1 to 10 that Google Ads calculates for every keyword. It is not a live auction grade: it is an aggregated estimate derived mostly from that keyword's historical exact-match performance. That is why newly added keywords show an empty score until enough click data accumulates. The number is not a ranking lever. It is a free diagnostic that tells you where your account is giving searchers the wrong answer.

What are the three components of Quality Score?

Quality Score is built from three components: expected click-through rate, ad relevance and landing page experience. None of them is reported as a number. Each is graded on a three-step scale: above average, average, below average. The scale is relative, meaning you are benchmarked against the other advertisers bidding on the same keyword. Every component that comes back below average is a concrete piece of work.

• Expected CTR: the predicted likelihood that your ad gets clicked when it is shown. It is stripped of position and ad format effects, so it does not go up simply because you rank at the top. It measures whether your copy actually answers the intent behind the search.
• Ad relevance: how closely your ad copy matches the meaning of the keyword and the search behind it. Google no longer looks for literal word overlap; it understands semantic proximity. Someone searching for 'best family SUV' finds a '7-seater with top safety ratings' promise relevant even without matching words.
• Landing page experience: the quality of everything after the click. Google looks at whether the page delivers on the keyword's promise, loads fast and works cleanly on mobile. Instant bounces and slow-loading pages drag this component down.

Does Quality Score still matter in 2026?

Yes, but its role has changed. In accounts dominated by Smart Bidding and broad match, the visible 1-10 number has stopped being a standalone success metric. The score is fed largely by exact-match history, while most of your impressions now come from broad match, so an account that is comfortably hitting its ROAS target can still display a mediocre score. Read the number as a diagnostic, never as a target.

Chasing an account-level average Quality Score is the most common mistake in this topic. The right view is the spend-weighted average: multiply every keyword's score by that keyword's spend, add them up and divide by total spend. Your brand keywords typically score 9-10 while spending almost nothing, so they inflate the simple average and hide the 4s and 5s on the generic keywords where the budget is actually flowing. To read quality alongside the bidding side, see our guide to Google Ads bidding strategies.

How does Quality Score affect Ad Rank and actual CPC?

Ad Rank is not decided by your bid alone: bid and ad quality work together. The consequence is simple. If your quality is high you win the same position with a lower bid; if it is low you pay more for the same position. That is what sets your actual CPC. What you pay is the minimum needed to clear the rank of the advertiser directly below you, and quality is the multiplier that pushes that threshold down.

• Roughly half the click price: the expected cost advantage of a keyword at Quality Score 10 versus the QS 5 baseline (representative compilation).
• Roughly 2.5 times the click price: the expected penalty on a keyword that falls to Quality Score 2, against the same baseline. At QS 1 the gap widens further.
• Roughly 90 days: the typical window of exact-match history that feeds the score, which is why your fixes never show up in the number immediately.

How do you improve Quality Score?

There is no shortcut. You fix the three signals in order: first clean up which searches the keyword is actually matching, then tighten the ad group's theme, then move the copy closer to the keyword, and finally make the landing page deliver on the promise in the ad. The effect usually becomes visible within two to six weeks, as fresh click data accumulates.

1. Search term hygiene. Open the search terms report weekly and strip out the irrelevant queries your keyword is matching. Every irrelevant impression pulls your expected CTR down. Use the layered list method in our negative keyword strategy guide.
2. Tighten the ad group theme. One ad group, one intent. If 'running shoes' and 'cheap trainers sale' sit in the same group, no single ad can answer both well, and ad relevance drops below average.
3. Move the copy closer to the keyword. Put the keyword verbatim in at least one headline, then use the remaining headlines for differentiators such as price, shipping and guarantees. In responsive search ads, rather than pinning everything, make sure every headline in the group serves the same intent.
4. Make the landing page match the promise. The promise in the ad should appear above the fold in the same words. The page should load fast on mobile and offer one clear action. Work through the checklist in our landing page conversion rate guide.
5. Work the spend-weighted list. Start with the top 20 keywords that spend the most and score below 5. Until those move, your account average will not improve in any meaningful way.

What does a low Quality Score actually cost?

A low Quality Score never appears as a penalty line on your invoice. It spreads quietly across every click. The impact only becomes visible when you put two ad groups from the same account, running the same bid strategy, side by side: the low-quality group is clicked less, converts less and pays more per click. Cost per acquisition is the actual CPC divided by the conversion rate, so those two effects multiply each other. In the representative index below, the CPC advantage stops at 38% while the cost per acquisition advantage reaches 60%. The weak click-through rate never shows up on the invoice at all; it shows up as volume, because the same budget buys fewer clicks.

Turn Quality Score into a target metric and it will mislead you. Read it component by component on the keywords your spend actually flows through, and it hands you the most concrete roadmap you have for lowering CPC. If you would rather not do that reading by hand, you can join the Ads Sensor pre-beta: it unifies your Google Ads, Meta Ads, TikTok Ads, Criteo and GA4 data in one panel and turns low-quality keywords into prioritised, reasoned actions. The ones you approve are applied through the platform API, and the result is tracked before and after.