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Quality Score is the most misunderstood number in Google Ads. It isn't a vanity metric — it directly affects how much you pay per click and where your ad ranks, which makes it one of the highest-leverage things to fix in an underperforming account.
The three components that make up the score
Quality Score is built from expected click-through rate, ad relevance, and landing page experience. Each is scored independently as below average, average, or above average, and the combination produces the 1–10 score shown in the account.
Fixing the score means diagnosing which of the three is dragging it down — a common mistake is rewriting ad copy when the actual problem is a slow or irrelevant landing page.
Ad relevance: the fastest fix
The keyword you're bidding on should appear, in some close form, in the ad headline. Generic ads running across broad keyword groups score poorly here because Google can't tell the ad was written for that specific search.
Tightly themed ad groups — a handful of closely related keywords per group, each with its own ad copy — consistently outperform a few broad groups trying to cover everything with generic messaging.
Landing page experience: the most overlooked lever
The landing page needs to match the ad's promise specifically, load quickly, and be easy to act on — not just be "relevant" in a general sense. Sending Search traffic to a generic homepage instead of a dedicated page for that offer is one of the most common Quality Score killers.
Page speed matters here too — a landing page that takes more than a few seconds to load loses both Quality Score and clicks before the message is ever read.
Expected click-through rate: earned, not gamed
This component is Google's prediction of how likely someone is to click your ad for that keyword, based on historical performance of similar ads. It rewards specific, benefit-led copy over generic claims every competitor makes.
Ad extensions — sitelinks, callouts, structured snippets — also feed into this by giving the ad more real estate and more reasons to click, which measurably improves CTR over time.
What a one-point improvement is actually worth
Google has stated that Quality Score improvements can meaningfully reduce cost-per-click for the same ad position — a few points of improvement across an account often shows up directly in a lower average CPC within a few weeks of consistent changes.
Because the effect compounds across every keyword in an account, Quality Score work usually has a better return than simply raising bids to fight for position.
The Quality Score scale Google assigns per keyword — built from expected CTR, ad relevance, and landing page experience combined.
Key takeaways
- Quality Score is built from expected CTR, ad relevance, and landing page experience.
- Tightly themed ad groups with keyword-matched headlines improve ad relevance fastest.
- Dedicated, fast-loading landing pages that match the ad's promise fix the most common score killer.
- Ad extensions improve expected CTR by giving the ad more reasons to be clicked.
- Improving Quality Score usually beats raising bids as a way to lower effective CPC.