Quality Score is one of the most misunderstood metrics in Google Ads. It's not a vanity number — it directly influences your cost per click and ad position. But a lot of advice about "improving" it focuses on the wrong levers.
Expected click-through rate
Google estimates how likely your ad is to be clicked when shown for a given keyword, based on historical performance of similar ads. Tightly themed ad groups with closely matched keywords tend to perform better here than broad, catch-all groups.
Ad relevance
This measures how closely your ad copy matches the intent behind a keyword. Generic ad copy reused across dozens of unrelated keywords is one of the most common reasons Quality Score suffers.
Landing page experience
Google evaluates whether your landing page is relevant, easy to navigate, and delivers on what the ad promised. A slow-loading or unrelated landing page can quietly cap your Quality Score no matter how good the ad itself is.
What doesn't move the needle much
Bidding higher doesn't improve Quality Score. Neither does simply adding more keywords. Quality Score responds to relevance and structure — not budget.
The practical takeaway: tightly structured campaigns, closely matched ad copy, and landing pages built for the specific offer tend to outperform broad, loosely organized accounts — often at a lower cost per click.