Quality Score is Google's 1-to-10 rating of how good your ad experience is for a given keyword. A 10 means Google considers your ad and landing page an excellent answer to that search; a 2 means Google is showing your ad somewhat reluctantly. (Technically it's a metric — a number — though an unusual one, as we're about to see; a dimension, by contrast, is a category you slice numbers by.)
The most useful way to think about it: Quality Score is a report card, not an exam result. It doesn't directly decide anything by itself — but it reflects the things that decide nearly everything: how often you show up, where on the page, and what you pay. Like an actual report card, the grade isn't the point. The grade tells you which subject needs work.
How it's calculated (no formula this time)
Quality Score has no formula you can run yourself — Google computes it from three components, each rated below average, average, or above average:
- Expected CTR — based on history, how likely is your ad to be clicked when shown for this keyword?
- Ad relevance — how closely does your ad's message match what the person searched for?
- Landing page experience — is the page they arrive at relevant, useful, and reasonably fast?
The three component ratings are visible in your Google Ads account next to the score, and they're the genuinely actionable part. A 4/10 on its own says "something's off". A 4/10 with below average landing page experience says "fix the page" — much more useful.
Why should I care about Quality Score?
Because Google's auction doesn't just reward the highest bidder — it rewards the best answer. Your ad rank is roughly your bid multiplied by your quality, which means a more relevant ad can sit above a richer competitor while paying less per click. Relevance is the discount code of the entire system.
In practice, the same ad position can cost meaningfully less for a high-quality keyword than a low-quality one. Improving the components doesn't only make your ads better — it makes them cheaper. That combination is rare enough in advertising to be worth taking seriously.
What's a good Quality Score?
Folk wisdom says 7+ is comfortable, 5–6 is fine, and persistent 1–4 deserves attention. But here's the part most guides skip, and the single most important thing on this page:
Quality Score is a diagnostic, not a KPI. Don't optimize the score; optimize the three components and let the score follow. Nobody's business goals include "achieve a 10". Your goals involve sales, and Quality Score is the dashboard light that points at what's blocking them. Polishing the dashboard light is not vehicle maintenance.
The diagnostic reading works like this: low expected CTR → the ad copy isn't tempting; rewrite headlines. Low ad relevance → the keyword and ad don't match; tighten your ad groups. Low landing page experience → the page disappoints after the click; improve its content match and speed. The score literally tells you where to act.
The classic mistakes
Optimizing the score for its own sake. A pattern we see in audits: hours spent nudging a keyword from 6 to 7 with no measurable change in sales, while a campaign next door bleeds budget on out-of-stock products. The score went up; the business didn't notice.
Panicking over low scores on tiny keywords. A 3/10 on a keyword with twelve impressions a month is statistical noise wearing a frowny face. Prioritize low scores on keywords that actually spend money.
Stuffing every keyword into one giant ad group. When forty loosely related keywords share one generic ad, ad relevance suffers for all of them — no single ad can match forty different searches. Tight, themed ad groups remain the unglamorous fix that works.
How do I improve my Quality Score?
Restructure ad groups around tight keyword themes so each ad can genuinely match its searches. Mirror the keyword in the headline — when someone searches for "ceramic plant pots" and the headline says "Ceramic Plant Pots", both the human and the algorithm relax. And give the landing page the same treatment: send the click to the matching category or product page, and make it load fast, especially on mobile.
Related metrics worth knowing: CTR (the live version of "expected CTR"), CPC (which Quality Score quietly discounts or inflates), and impression share (low scores often surface as share lost to rank).
Key Idea: Quality Score is a grade, not a goal. Optimize the three components — ad copy, relevance, landing page — and the score, the costs, and the results all follow on their own.
This week's homework: in Google Ads, add the three Quality Score component columns to your keyword view, sort by spend, and check the components on your top ten keywords. Fix the one weak component on the most expensive keyword. One keyword, one component, this week.
If you'd rather have your account's expensive weak spots surfaced for you — alongside the categories where you're not showing up at all — that's what we do at airdan.ai. The homework above costs nothing, though, and we stand by it.
FAQ
What is a good Quality Score in Google Ads? 7+ is generally comfortable and 5–6 is fine; persistent scores of 1–4 on keywords that spend real money deserve attention. The component ratings matter more than the number itself.
Does Quality Score affect CPC? Yes — higher-quality ads need a lower bid to win the same position, so improving the components effectively discounts your clicks.
What are the three components of Quality Score? Expected CTR (will people click this ad?), ad relevance (does the ad match the search?), and landing page experience (is the page useful and fast?). Each is rated below average, average, or above average in your account.
How do I improve a low Quality Score? Read the weak component as the instruction: low expected CTR → better ad copy; low ad relevance → tighter ad groups; low landing page experience → a faster, better-matched page.