Quality Score is Google's 1-10 rating of how relevant and useful your ad and landing page are to someone searching for your keyword. A higher Quality Score means you pay less per click and get better ad positions. In practical terms, an advertiser with a Quality Score of 9 can pay 50% less per click than a competitor with a Quality Score of 5, for the exact same keyword.
I think of Quality Score as Google's way of rewarding advertisers who give searchers what they actually want. If someone searches "emergency plumber near me" and your ad says "Emergency Plumber, 24/7 Service" leading to a page specifically about emergency plumbing, Google recognizes that's a great experience and charges you less. If your ad says "General Handyman Services" leading to a homepage with 15 menu items, Google penalizes you with higher costs.
What are the three components of Quality Score?
Quality Score is made up of three components: Expected Click-Through Rate (CTR), Ad Relevance, and Landing Page Experience. Each component is rated as "Below Average," "Average," or "Above Average." Google combines them into the 1-10 score you see in your account.
Here's what each one means:
| Component | What Google Evaluates | Weight | You Control It By |
|---|---|---|---|
| Expected CTR | How likely people are to click your ad compared to competitors | ~40% | Writing compelling headlines, using ad extensions, testing ad variations |
| Ad Relevance | How closely your ad text matches the searcher's query | ~25% | Organizing tight ad groups, including the keyword in headlines/descriptions |
| Landing Page Experience | How useful and relevant your landing page is after the click | ~35% | Dedicated landing pages per service, fast load times, mobile-friendly design, clear CTAs |
The most common mistake I see is businesses focusing entirely on Expected CTR (writing clickbait-y headlines) while ignoring Landing Page Experience. In my experience, landing page improvements have the most durable impact on Quality Score because they also improve your conversion rate, so you're getting a double benefit.
Google doesn't reveal the exact formula, and Quality Score is calculated at the keyword level. The same keyword in two different ad groups can have different Quality Scores because the ads and landing pages are different. This is why campaign structure matters so much.
How does Quality Score affect what I actually pay per click?
Quality Score directly determines your actual cost per click through the Ad Rank auction. A higher Quality Score means a steeper discount on the maximum CPC you'd otherwise pay. The relationship isn't linear, the difference between a QS of 3 and a QS of 7 is much larger than the difference between 7 and 8.
Here's the real-world impact based on Google's auction mechanics:
| Quality Score | CPC Modifier | Effective CPC (if base = $20) | Monthly Savings (on $2,000 spend) |
|---|---|---|---|
| 10 | -50% | $10.00 | $1,000 saved |
| 9 | -44% | $11.20 | $880 saved |
| 8 | -37% | $12.50 | $750 saved |
| 7 | Baseline | $20.00 | $0 (baseline) |
| 6 | +17% | $23.40 | $340 extra |
| 5 | +25% | $25.00 | $500 extra |
| 4 | +43% | $28.60 | $860 extra |
| 3 | +67% | $33.40 | $1,340 extra |
| 2 | +150% | $50.00 | $3,000 extra |
| 1 | +400% | $100.00 | $8,000 extra |
This table is why I tell every local business owner: before you increase your budget, improve your Quality Score. Moving from a 5 to a 7 on your top keywords effectively gives you 25% more budget without spending an extra dollar. That's the equivalent of $500/month in savings on a $2,000 campaign.
Quality Score also affects your ad position. In Google's ad auction, Ad Rank = Max CPC x Quality Score. So an advertiser bidding $15 with a QS of 8 (Ad Rank: 120) will outrank an advertiser bidding $20 with a QS of 5 (Ad Rank: 100), while paying less per click.
How do I check my Quality Score in Google Ads?
Go to your Keywords tab, click "Columns," then "Modify columns," and add "Quality Score" plus its three components (Expected CTR, Ad Relevance, Landing Page Experience). Quality Score only appears at the keyword level, there's no campaign-level or account-level Quality Score in the interface.
A few important things to know about how Quality Score is reported:
- Quality Score updates when Google has enough data, new keywords start at a default score and update as impressions accumulate
- The number you see is a snapshot, it's recalculated for every single auction in real time, but the reported number updates periodically
- Historical Quality Score, Google also shows "Quality Score (hist.)" which tracks how your score has changed over time. This is useful for seeing if your optimizations are working
- Null Quality Score, keywords with very few impressions may show "--" instead of a number. This doesn't mean your score is bad; it means Google doesn't have enough data yet
I check Quality Score weekly for my top-spending keywords and monthly for the full keyword list. If any keyword that's spending significant budget has a QS below 5, that's a priority fix.
How do I improve Expected Click-Through Rate?
Expected CTR improves when your ads get clicked at a higher rate than competitors for the same keyword. The most effective approach is writing headlines that directly address the searcher's intent and give them a reason to click your ad over the other three on the page.
Specific tactics that work:
- Include the keyword in Headline 1, if someone searches "drain cleaning service," your first headline should be "Professional Drain Cleaning Service" or "Drain Cleaning, Same-Day Service." This is the single highest-impact change
- Add urgency or a differentiator in Headline 2, "Available 24/7," "Free Estimates," "Licensed & Insured"
- Use all available ad extensions, sitelinks, callouts, structured snippets, call extensions, location extensions. Extensions increase your ad's visual size and give more reasons to click. Google says extensions can improve CTR by 10-15%
- Pin strategically, pin your highest-performing headline to position 1, but leave positions 2 and 3 unpinned so Google can test combinations
- Test at least 2-3 ad variations per ad group, let Google's algorithm find winners, then replace the losers
Here's what "Above Average" Expected CTR looks like in practice:
| Industry | Average CTR | "Above Average" Target |
|---|---|---|
| Plumbing | 4-6% | 7%+ |
| HVAC | 4-5% | 6.5%+ |
| Legal | 3-5% | 6%+ |
| Dentist | 4-6% | 7%+ |
| Roofing | 3-5% | 6%+ |
| General Local Services | 4-6% | 7%+ |
One honest caveat: Expected CTR is partially outside your control. If you're in an extremely competitive market with 5+ advertisers all running polished ads, even a great ad might score "Average" instead of "Above Average." Focus on what you can control and don't obsess over getting every keyword to 10.
How do I improve Ad Relevance?
Ad Relevance improves when your ad text closely matches the keywords in your ad group. The fix is almost always structural, reorganize your ad groups so each one contains tightly related keywords with ads written specifically for those keywords.
The most common problem I diagnose is "ad group bloat." A plumber puts 30 keywords in one ad group:
- emergency plumber
- drain cleaning
- water heater installation
- toilet repair
- sewer line replacement
Then writes one set of ads that tries to cover all five. Google sees someone search "water heater installation" and shows an ad about "Expert Plumbing Services", that's not relevant to what they searched. Ad Relevance drops.
The fix:
- Split into focused ad groups, one for emergency services, one for drains, one for water heaters, one for fixture repair
- Write 3-5 headlines per ad group that include the ad group's core keyword, "Water Heater Installation," "New Water Heater, Free Estimate," "Tankless Water Heater Experts"
- Use keyword insertion sparingly,
{KeywordInsertion:Plumber}dynamically inserts the triggering keyword into your headline. Useful for ad groups with 3-5 closely related keywords, but can look awkward if your keywords are too diverse - Match your description to the ad group theme, if the ad group is about drain cleaning, your description should mention drain cleaning, not generic plumbing
The gold standard is one core keyword theme per ad group with 5-10 keyword variations, all sharing a set of ads written for that specific theme. This structure takes more time to set up but the Quality Score improvement (and resulting CPC savings) is almost always worth it.
How do I improve Landing Page Experience?
Landing Page Experience is about what happens after the click. Google evaluates whether your landing page delivers on the promise your ad made, loads quickly, works well on mobile, and makes it easy for visitors to find what they need. Sending ad clicks to your homepage is the most common way to tank this score.
Here's what Google specifically evaluates:
| Factor | What Google Wants | Common Mistake |
|---|---|---|
| Relevance | Page content matches the ad and keyword | Sending all ad clicks to the homepage instead of service-specific pages |
| Load speed | Page loads in under 3 seconds on mobile | Heavy images, unoptimized code, slow hosting |
| Mobile-friendliness | Works perfectly on phones (where 60%+ of local searches happen) | Tiny text, buttons too small to tap, horizontal scrolling |
| Clear navigation | Easy to find info and take action (call or fill form) | Cluttered pages, no clear CTA, phone number buried in footer |
| Original content | Useful, unique content relevant to the search | Thin pages with just a form and no context |
| Trustworthiness | Business info, reviews, licensing, contact details visible | No trust signals, no reviews, no business address |
The highest-impact improvement for most local businesses is creating dedicated landing pages for each ad group. When someone searches "water heater installation" and clicks your ad, they should land on a page specifically about water heater installation, with pricing info, your process, reviews from water heater customers, and a clear "Get a Free Estimate" button.
I've seen Quality Scores jump from 4 to 7 just by switching from a homepage to a service-specific landing page. That alone can cut CPC by 40%.
Page speed matters more than most people realize. Google's data shows that as page load time goes from 1 second to 3 seconds, bounce probability increases by 32%. From 1 to 5 seconds, it increases by 90%. If your landing page takes 4+ seconds to load on mobile, you're losing visitors before they even see your content.
Does Quality Score matter for Smart Bidding campaigns?
Yes, but with a nuance. When you use automated bidding strategies (Maximize Conversions, Target CPA, etc.), Google uses real-time Quality Score signals in every auction, but the reported Quality Score number in your account becomes less actionable as a direct lever. Google's algorithm is already factoring in relevance signals when deciding how much to bid.
That said, the underlying factors that determine Quality Score, ad relevance, landing page quality, expected CTR, still matter enormously for Smart Bidding campaigns. Better landing pages still convert more visitors. More relevant ads still get higher CTRs. These fundamentals don't go away just because you've turned on automated bidding.
My recommendation: optimize for Quality Score fundamentals (tight ad groups, relevant ads, fast landing pages) before turning on Smart Bidding. Then let Smart Bidding optimize your bids within that well-structured framework. The combination of strong fundamentals + automated bidding is what separates great campaigns from mediocre ones.
What's a "good" Quality Score and when should I worry?
A Quality Score of 7 or above is generally good. Scores of 8-10 mean you're doing better than most advertisers for that keyword. Below 5 means something specific is wrong and needs attention. Don't aim for 10 on every keyword, that's unrealistic and some keywords are inherently harder to score well on.
Here's how I prioritize Quality Score improvements:
| Quality Score | Status | Action |
|---|---|---|
| 8-10 | Excellent | Leave it alone. Focus your optimization time elsewhere |
| 7 | Good | Baseline. Minor tweaks if it's a high-spend keyword |
| 5-6 | Below average | Check which component is dragging it down. Fix that component |
| 3-4 | Poor | Likely wasting significant budget. Restructure ad group, rebuild landing page |
| 1-2 | Critical | Pause the keyword. Your ad/landing page combination is fundamentally mismatched |
The component breakdown is key for diagnosis. If you see "Below Average" on Landing Page Experience but "Above Average" on CTR and Ad Relevance, you know exactly where to focus: your landing page needs work, not your ads.
One thing I want to be honest about: Quality Score is a relative metric. Google compares you to other advertisers bidding on the same keyword. In highly competitive categories like personal injury law, even a well-optimized campaign might only score 6-7 because everyone is running polished campaigns. The score reflects relative quality, not absolute quality.
If you're unsure whether your Quality Scores are where they should be, or you want to identify which specific components need work, our free Google Ads audit quiz walks through the factors that affect Quality Score and tells you where your campaign is leaking money. It takes about 3 minutes and covers conversion tracking, keyword structure, ad relevance, and landing page quality.