Google Ads can drain money fast if done wrong. Here are the most common mistakes and how to fix them.
Campaign Structure Mistakes
1. One Campaign for Everything
Mistake: Dumping all keywords into one campaign.
Why Bad: Can't control budgets, bids, or targeting effectively.
Fix: Separate campaigns by intent, product line, or geography.
2. Too Many Keywords Per Ad Group
Mistake: 50+ keywords in one ad group.
Why Bad: Ads can't be relevant to all keywords.
Fix: 5-15 closely related keywords per ad group.
3. Ignoring Match Types
Mistake: Using only broad match.
Why Bad: Shows for irrelevant searches, wastes budget.
Fix: Use phrase and exact match for control, broad for discovery.
Targeting Mistakes
4. No Negative Keywords
Mistake: Never adding negative keywords.
Why Bad: Paying for irrelevant clicks.
Fix: Add negatives weekly from search terms report.
Common negatives:
- free, cheap, DIY
- jobs, careers, salary
- reviews (if not selling reviews)
- competitors (unless conquesting)
5. Too Broad Geography
Mistake: Targeting entire country when serving locally.
Why Bad: Wasting budget on unreachable customers.
Fix: Target only serviceable areas.
6. Wrong Location Settings
Mistake: "People interested in" vs "People in" location.
Why Bad: Shows to people not actually in your area.
Fix: Use "Presence: People in or regularly in" for local.
Bidding Mistakes
7. Set It and Forget It
Mistake: Setting bids and never adjusting.
Why Bad: Missing optimization opportunities.
Fix: Review and adjust bids weekly.
8. Wrong Bidding Strategy
Mistake: Using maximize clicks when you need leads.
Why Bad: Optimizes for wrong outcome.
Fix: Use conversion-focused bidding when you have data.
9. No Bid Adjustments
Mistake: Same bids for all times, devices, locations.
Why Bad: Overpaying in low-converting segments.
Fix: Analyze performance and adjust bids accordingly.
Ad Copy Mistakes
10. Generic Ad Copy
Mistake: "We're the best" without specifics.
Why Bad: Doesn't differentiate, low CTR.
Fix: Include specific benefits, numbers, unique selling points.
11. No Ad Extensions
Mistake: Running ads without extensions.
Why Bad: Smaller ads, less visibility, lower CTR.
Fix: Add all relevant extensions: sitelinks, callouts, structured snippets.
12. Not Testing Ads
Mistake: One ad per ad group, never testing.
Why Bad: Missing better performing variations.
Fix: Run 3-4 ad variations, let data decide winner.
Landing Page Mistakes
13. Sending to Homepage
Mistake: All ads go to homepage.
Why Bad: No message match, poor conversion.
Fix: Create dedicated landing pages matching ad message.
14. Slow Landing Pages
Mistake: Ignoring page speed.
Why Bad: Higher bounce, lower Quality Score, higher costs.
Fix: Optimize for under 3 seconds load time.
Tracking Mistakes
15. No Conversion Tracking
Mistake: Not tracking conversions or tracking wrong.
Why Bad: Can't optimize, no ROI data.
Fix: Implement proper tracking for all valuable actions.
Quick Audit Checklist
- [ ] Campaigns organized logically
- [ ] Ad groups have 5-15 keywords
- [ ] Using phrase/exact match appropriately
- [ ] Negative keywords list active
- [ ] Location targeting correct
- [ ] Conversion-based bidding (if data exists)
- [ ] All relevant extensions added
- [ ] Multiple ads per ad group
- [ ] Landing pages match ads
- [ ] Conversion tracking working
See our Google Ads guide for best practices.
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Related: Google Ads Guide | Quality Score Guide