This guide covers 6 places to look for wasted ad spend across Google Ads and Meta: search terms, placements, audiences, timing and geography, bid strategy leaks, and creative waste.
Search Terms: The Biggest Source of Waste
Start here. Go to any Search campaign in Google Ads, click "Search terms" in the left menu, set the date range to last 30 days, and sort by cost descending. You're scanning for terms that are eating budget without converting.
Three categories to watch for:
- Completely irrelevant queries. If you sell accounting software and you're paying for "accounting jobs near me," that's pure waste.
- Informational queries. "What is CRM software" is someone researching, not buying. These have very low conversion rates for most businesses.
- Competitor brand searches. Unless you have a specific conquest strategy, paying premium CPCs for clicks on competitor brand names rarely converts well.
On most accounts, 15-25% of search spend goes to terms that should be excluded. Add them as negative keywords immediately and create shared negative keyword lists at the account level for common patterns like "free," "jobs," "salary," and "DIY."
Placements: Where Your Display and Video Ads Actually Show
If you're running Display, YouTube, or Performance Max campaigns, check where your ads are actually appearing. Go to the Placements report and sort by cost.
Common waste areas:
- Mobile app placements: Ads on games and utility apps often get accidental clicks. If your CPA from "mobileapp::2-com.example.app" placements is 5x higher than other placements, exclude mobile apps entirely.
- Low-quality websites: Display network includes millions of sites. Some are legitimate publishers. Others are content farms designed to generate ad revenue. Check your placement report for sites with high spend and zero conversions.
- YouTube channels that don't match your audience: Your B2B software ad running on children's content channels is wasted spend.
Audiences: Spending on People Who Won't Convert
Check your audience segments in both Google and Meta. You're looking for two things: audiences you should exclude and audiences getting budget despite poor performance.
Common exclusion gaps:
- Existing customers not excluded from acquisition campaigns
- Past converters still in remarketing audiences
- Employees or partners clicking on your ads
On Meta specifically, use the Audience Overlap tool to find ad sets competing with each other. More than 30% overlap means you're bidding against yourself.
Timing and Geography: When and Where Money Leaks
Look at performance by hour of day and day of week. Many B2B accounts waste budget on weekends when their target audience isn't working. Many ecommerce accounts waste budget during low-conversion overnight hours.
For geography, check your location report. If you're targeting the US but 15% of clicks come from locations outside your service area (due to "presence or interest" targeting), switch to "presence only" targeting.
Bid Strategy Leaks
Two common bid-related waste patterns:
- Target CPA/ROAS set too aggressively: When the algorithm can't hit an unrealistic target, it either stops spending entirely or overspends on low-quality traffic. Set targets based on actual trailing performance.
- Best-performing campaigns limited by budget: If your highest-ROAS campaign is budget-capped while a 1x ROAS campaign runs unrestricted, you're leaving money on the table. Reallocate budget from losers to winners.
Creative Waste: Ads That Underperform
Within any campaign, check individual ad performance. If you have 3 ads in an ad group and one has a 5% CTR while another has 1.5%, the low performer is dragging down your overall Quality Score and wasting impressions.
On Meta, this shows up as ad-level CPA differences within the same ad set. Pause clear underperformers manually rather than waiting for the algorithm to figure it out.
For a broader framework on auditing your entire account, check our 30-minute Google Ads audit or the Meta Ads audit checklist.
Frequently Asked Questions
Accounts with no recent audit typically waste 20-35% of budget on fixable issues. Accounts with active management still usually have 10-15% waste that can be reduced.
Search terms: weekly. Placements: monthly. Audiences and bid strategies: at least quarterly. The more you spend, the more frequently you should check.
Reinvest it into your best-performing campaigns and keywords. Budget saved from waste isn't just savings. It's budget you can redirect to things that actually work.
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