When Google Ads gets expensive, most founders raise their bid. That's the wrong fix. If your Quality Score is low, you're paying a penalty on every single click — and no amount of extra budget cancels it out.
What Quality Score actually measures
Quality Score is a 1–10 number Google assigns to each keyword in your account. It's not an account-level grade. It's per keyword.
It's built from three components:
- Expected CTR — how likely Google thinks people are to click your ad, compared to other ads showing in the same position
- Ad Relevance — how closely your ad matches the keyword and the searcher's intent
- Landing Page Experience — whether the page you send users to actually answers what they searched for
Each component is rated: Below average, Average, or Above average.
The math that lets you underbid and win
Ad Rank determines where your ad shows. Most people assume it's just a bidding war. It isn't. The formula is:
Ad Rank = Bid × Quality Score × (context signals)
Here's what that looks like in practice:
| You | Competitor | |
|---|---|---|
| Bid | $3 | $6 |
| Quality Score | 8 | 3 |
| Ad Rank | 24 | 18 |
| Position | 1 | 2 |
You win position 1 with half their bid.
The actual CPC you pay is calculated from the Ad Rank of the person below you, divided by your Quality Score, plus $0.01. So you get the top spot and pay roughly $2.30, not $3. The competitor pays close to $5.50 for second place.
That gap compounds over thousands of clicks. A Quality Score of 8 versus 3 on a high-volume keyword can mean paying 2–3× less for the same traffic.
What kills Quality Score
1. Your ad copy doesn't mirror the keyword You're bidding "white running shoes" but your headline says "Minimalist Style, Shipped Fast." Google doesn't see "running" anywhere in your ad. Ad Relevance drops.
2. Your landing page doesn't match the search intent Someone searches "accounting software for retail stores" and lands on your homepage that sells five different products. Landing Page Experience: Below average. Every time.
3. A history of low CTR 10,000 impressions, 30 clicks. That's a 0.3% CTR. Google treats it as a signal your ad isn't relevant. Expected CTR goes down and stays down until you fix the copy.
4. Too many unrelated keywords crammed into one Ad Group An Ad Group with 40 keywords spanning different intents can't be served well by one set of ad copy. You'll have low Ad Relevance across the board.
How to check it in 60 seconds
Open Google Ads → Keywords → Add columns:
- Quality Score
- Exp. CTR (qual.)
- Ad relevance (qual.)
- Landing page exp. (qual.)
Sort by Quality Score ascending. Keywords scoring 1–4 are where you're overpaying right now. Fix those first.
| Quality Score | What to do |
|---|---|
| 1–3 | Fix all three: split Ad Groups, rewrite copy, fix landing page |
| 4–5 | Find the one "Below average" component and fix that first |
| 6–7 | Tighten copy to include the keyword more directly, or split the Ad Group |
| 8–10 | Leave it alone |
What to do next
Quality Score is the foundation before you scale any Google Ads campaign. Adding budget with a low score doesn't fix anything. It just means paying more for the same results. If you're running both Meta and Google, AdBlueprint helps you see which channel is working for your audience before you add spend. Generate a blueprint and check the channel recommendation before you scale.