Keywords that prevent your ads from showing for specific search terms, helping you avoid irrelevant clicks and wasted budget.
What are negative keywords in Google Ads? Negative keywords prevent your ads from showing for specific search terms, blocking irrelevant traffic and wasted budget. Adding negatives like "free," "jobs," or "DIY" stops your ads from appearing when searches contain those terms. Review Search Terms report weekly and add 5-10 new negatives per campaign. Well-optimized campaigns have 200-500 negatives blocking 10-20% of search volume.
Negative keywords let you exclude search terms from your campaigns and help you focus on only the keywords that matter to your customers. According to Google, "A negative keyword is a type of keyword that prevents your ad from being triggered by a certain word or phrase." When you add negative keywords to your campaigns or ad groups, you tell Google Ads not to show your ads for searches containing those terms.
Negative keywords work across all match types just like regular keywords. Negative exact match [-negative keyword-] blocks only exact searches for that phrase, negative phrase match ["negative keyword"] blocks searches containing that phrase in order, and negative broad match (no symbol, just the word) blocks searches containing all words in any order. Unlike regular keywords, negative broad match is more restrictive—it blocks searches containing all the negative words, even if other words are present. For example, negative broad match "free software" blocks "free software download" but also "download software free."
Negative keywords are essential for budget efficiency and campaign profitability. Without negative keywords, broad and phrase match keywords trigger ads for irrelevant searches that waste money. A campaign selling "premium leather shoes" without negative keywords might show for "cheap shoes," "free shoes," "shoe repair," or "cartoon shoes"—all searches unlikely to convert. Well-managed accounts typically have 200-500+ negative keywords preventing 20-40% of wasted spend on irrelevant traffic.
Official Source: Definition verified from Google Ads Help Center (Last verified: January 2026)
"Negative keywords let you exclude search terms from your campaigns and help you focus on only the keywords that matter to your customers."
An online course platform selling "Python programming certification" for $499 initially has no negative keywords. Search Terms report shows wasted clicks.
Before Negative Keywords (Month 1): - Total Clicks: 1,200 - Irrelevant Clicks: 420 (35%) - Wasted Spend: $2,520 (420 clicks × $6 avg CPC) - Conversions: 18 (all from relevant clicks) - Cost Per Conversion: $400 Irrelevant Search Terms Found: - "free python course" (85 clicks, $510 wasted) - "python programming jobs" (120 clicks, $720 wasted) - "python tutorial youtube" (95 clicks, $570 wasted) - "learn python free download" (70 clicks, $420 wasted) - "python cheat sheet" (50 clicks, $300 wasted) After Adding Negatives (Month 2): - Negatives Added: free, jobs, job, career, salary, tutorial, youtube, download, cheat, sheet - Total Clicks: 780 (relevant only) - Wasted Clicks: 0 - Total Spend: $4,680 (same budget, more relevant clicks) - Conversions: 32 (improved from better targeting) - Cost Per Conversion: $146 (64% improvement)
Negative keywords prevent 15-30% of wasted ad spend in typical campaigns by blocking irrelevant searches. Without negatives, a campaign targeting "project management software" might waste budget on "free project management tools," "project management jobs," "project management training," or "free download"—searches from people not ready to buy. Adding 50-100 relevant negative keywords can reduce costs by 20-30% while maintaining or improving conversion volume since you're cutting bad traffic, not good traffic.
Negative keywords also improve Quality Score and CTR by preventing your ads from showing for searches where they'd perform poorly. If your ad shows for irrelevant searches and gets ignored (low CTR), Google's algorithm interprets this as poor ad quality, damaging your Quality Score. By blocking irrelevant searches with negatives, you ensure your ads only show when relevant, maintaining high CTR (6%+) and strong Quality Scores (7-10). This creates a positive cycle: better targeting → higher CTR → better Quality Score → lower CPC.
Adding too many negative keywords and accidentally blocking relevant traffic
Not reviewing Search Terms report weekly to identify new negative keyword opportunities
Using only broad match negatives when exact or phrase match would be more appropriate
Forgetting to add negatives to new campaigns (starting fresh each time)
Not creating shared negative keyword lists for efficiency across campaigns
Review Search Terms report every 7-10 days and add 5-10 new negatives per campaign
Create negative keyword lists by theme: "free" terms, competitor names, jobs, training, DIY
Add common negatives immediately: free, cheap, DIY, jobs, careers, salary, training, course, tutorial
Use exact match negatives [-free-] for terms you want to block precisely, phrase for partial blocking
Apply account-level negative keywords for universal exclusions (competitor names, irrelevant products)
Start with 50-100 negatives based on industry knowledge before campaign even runs
Track how many searches negatives block monthly—target blocking 10-20% of total search volume
Negative keywords prevent your ads from showing when searches contain those terms. You add negatives at the campaign or ad group level, and Google Ads excludes your ads from auctions matching those negatives. For example, adding negative keyword "free" prevents your ads from showing for "free CRM software," "CRM free trial," or "best free CRM." Match types matter: negative exact [-free-] only blocks "free" by itself, negative phrase ["free trial"] blocks any search with "free trial" in that order, and negative broad (free trial) blocks searches with both words in any order. Unlike positive broad match, negative broad is restrictive—it blocks when all words are present. Most advertisers use negative phrase match for the right balance of blocking power and safety.
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