What Is Google Ads Quality Score (And Why It's Costing You Money)

If you're running Google Ads and paying more per click than you think you should be, Quality Score is one of the first places to look. It's a 1-to-10 rating Google assigns to each keyword in your account, and it directly influences what you pay every time someone clicks your ad.

The core idea: Google rewards advertisers who run relevant, well-structured campaigns by letting them pay less per click. Advertisers with poor ad quality pay more for the same placement. Understanding how that works, and where your score comes from, gives you a concrete way to reduce wasted spend.

What Quality Score Actually Measures

Google calculates Quality Score from three factors, each rated as "Above average," "Average," or "Below average":

• Expected click-through rate (CTR): How likely Google thinks someone is to click your ad when it shows for a given keyword, based on your ad's historical performance and relevance to the search term.
• Ad relevance: How closely your ad copy matches the intent behind the keyword. An ad for "emergency plumber Hamilton" that doesn't mention plumbing or your service area will score poorly here.
• Landing page experience: Whether the page someone lands on after clicking actually delivers what the ad promised. Google evaluates relevance, load speed, and mobile usability.

A score of 7 to 10 is considered strong. A score of 3 or below is a signal that something is meaningfully misaligned between your keyword, your ad, and your landing page.

How Quality Score Affects What You Pay

Google's ad auction doesn't just reward the highest bidder. Ad Rank, the metric that determines your ad's position and actual cost-per-click, is calculated from your bid combined with your Quality Score and other factors like ad extensions.

The practical consequence: an advertiser with a lower bid but a high Quality Score can rank above a competitor with a higher bid but poor ad quality. And because your actual CPC is partially derived from the auction dynamics, a higher Quality Score generally means you pay less per click for the same position.

This is why two advertisers with identical bids can have very different results. If you've ever run a campaign and felt like the costs were higher than they should be, a below-average Quality Score is a likely contributor.

How to Improve Expected CTR

Expected CTR is a function of how compelling your ad is for the search term. The most direct way to improve it is tighter keyword-to-ad alignment.

The most common mistake in small business Google Ads campaigns is grouping too many different keywords into one ad group and writing a single ad that tries to speak to all of them. The ad ends up generic because it has to be.

The fix: tighter ad groups with fewer, closely related keywords and ad copy that speaks directly to those specific searches. An ad that says "Emergency Plumber in Hamilton, ON. 24/7 Available" will have a much higher CTR for the search "emergency plumber Hamilton" than an ad that says "Plumbing Services. Call Us Today."

Including the keyword (or a close variant) in the headline is a direct CTR lever. Dynamic Keyword Insertion can help at scale, but manually written ads tailored to small, tight keyword groups usually outperform it for local service businesses.

How to Improve Ad Relevance

Ad relevance measures how closely your ad text matches what someone was searching for. If your keywords and ad copy are speaking different languages, relevance will be rated "Below average."

The fix here is the same as CTR: restructure into smaller, tighter ad groups where every keyword in the group is closely related, and write ad copy specifically for that cluster. A campaign for a dental practice, for example, should have separate ad groups for "dental cleaning," "teeth whitening," and "emergency dentist," each with ad copy written for that specific service. One ad trying to cover all three will score poorly for all of them.

How to Improve Landing Page Experience

This is where many small business campaigns lose ground, because the solution sits outside the Google Ads interface entirely.

Landing page experience is rated based on three main things: whether the page content matches what the ad promised, how fast the page loads, and whether it works well on mobile. A slow, generic homepage used as the landing page for every campaign is a common pattern that produces below-average scores across the board.

The fix: send each ad group to a page that specifically addresses what the ad promised. An ad for "emergency plumber Hamilton" should land on a page about emergency plumbing in Hamilton, not your general services homepage. If you don't have specific landing pages, that's worth building. Purpose-built landing pages typically outperform homepage traffic for paid search, both on Quality Score and actual conversion rate.

Page speed matters too. Google factors load time into landing page experience. A page that takes more than 3 seconds to load on mobile will struggle to score well here regardless of how relevant the content is.

Where to Find Your Quality Scores

In Google Ads, go to the Keywords tab in your campaign. Add the Quality Score column (it's not displayed by default). You'll see the 1-to-10 score for each keyword. Click into "Quality Score (hist.)" to see the breakdown by component: expected CTR, ad relevance, and landing page experience each rated as Above average, Average, or Below average.

Focus your fixes on keywords with scores of 5 or below first. Those are the ones actively costing you more per click. Bring them up to 7 or above and you'll notice a difference in average CPC relatively quickly, usually within a few weeks of consistent data.

Frequently Asked Questions

Does Quality Score affect all campaign types?

Quality Score applies to Search campaigns, where your ads compete in keyword-based auctions. It's less directly relevant to Display, Shopping, or Performance Max campaigns, which use different signals. For most local service businesses, Search campaigns are where Quality Score has the most impact on actual results.

How long does it take for Quality Score to improve?

Google recalculates Quality Score continuously as new data comes in. After making changes to ad copy or landing pages, you typically see score movement within a few weeks, once the campaigns have enough impressions to register a meaningful change. It's not instant, but it's not a months-long process either for campaigns with active traffic.

Should I pause keywords with low Quality Scores?

Not automatically. A keyword with a low Quality Score that's still converting profitably may be worth keeping while you work on improving it. Pausing it removes potential revenue without necessarily solving the underlying issue. The better move is to fix the ad relevance and landing page alignment first, then evaluate whether the keyword belongs in the campaign at all.

If you'd like someone to review your Google Ads account and identify where Quality Score is affecting your results, book a call and we'll walk through it with you.