Negative keywords prevent your ads from showing when users search for terms that won’t convert. They’re the most direct way to stop wasting ad spend on irrelevant clicks — and the most commonly underused optimization lever in Google Ads.
The mechanics are straightforward: you add a word or phrase as a negative keyword, and Google blocks your ad from appearing in searches that include that term. But how Google interprets “include” depends entirely on which negative match type you choose — broad, phrase, or exact — and each type blocks traffic differently.
There’s one critical distinction that trips up most advertisers: negative keywords do not match close variants, synonyms, plurals, or misspellings. This is the opposite of how positive keywords work. If you add “running shoes” as a negative keyword, your ad can still show for “running shoe” (singular), “run shoes,” or “jogging sneakers.” You have to add each variation separately. This single difference is responsible for most negative keyword strategy failures.
How the Three Negative Match Types Work
Negative Broad Match
The default type. No special formatting — just type the keyword. Your ad is blocked when the search contains all of your negative keyword terms, in any order. If a search is missing even one term, your ad can still show.
Negative keyword: running shoes
| Search Query | Ad Shows? | Why |
|---|---|---|
| blue running shoes | Blocked | Contains both “running” and “shoes” |
| running shoes sale | Blocked | Contains both terms |
| shoes running cheap | Blocked | Both terms present, order irrelevant |
| running gear | Shows | Missing “shoes” |
| running shoe | Shows | “Shoe” (singular) is not “shoes” — no close variant matching |
| jogging sneakers | Shows | Different words entirely — no synonym matching |
Negative broad match casts the widest net of the three types. It’s the right choice for general exclusions where you want to block a concept across many query variations: “free,” “jobs,” “DIY,” “how to,” “salary.”
Negative Phrase Match
Formatted with quotation marks: “running shoes”. Your ad is blocked when the search contains your negative keyword terms in the exact order you specified. Additional words can appear before or after the phrase, but the phrase itself must be intact.
Negative keyword: “running shoes”
| Search Query | Ad Shows? | Why |
|---|---|---|
| best running shoes | Blocked | Phrase appears in order, extra word before |
| running shoes for women | Blocked | Phrase appears in order, extra words after |
| shoes for running | Shows | Words are present but in different order |
| running athletic shoes | Shows | “Athletic” breaks the phrase sequence |
Negative phrase match is the best choice when you need to block a specific intent without accidentally blocking queries where those words appear in a different context. “Running shoes” as a phrase negative blocks all running shoe queries while still allowing “shoes for running trails” (where the intent might be different).
Negative Exact Match
Formatted with square brackets: [running shoes]. Your ad is blocked only when the search matches your negative keyword exactly — same words, same order, no additional words.
Negative keyword: [running shoes]
| Search Query | Ad Shows? | Why |
|---|---|---|
| running shoes | Blocked | Exact match |
| best running shoes | Shows | Extra word present |
| running shoes sale | Shows | Extra word present |
| running shoe | Shows | Singular, not matched |
Negative exact match is the most precise and least restrictive type. Use it when you need to block one specific query without any risk of blocking related queries that might convert. This is the safest option but requires the most keywords to achieve comprehensive coverage.
The Close Variant Rule: Why Most Negative Strategies Fail
This point is worth repeating because it causes the majority of negative keyword problems: negative keywords do not expand to close variants.
With positive keywords, Google automatically matches your keyword to plurals, misspellings, synonyms, abbreviations, and reworded versions with the same intent. Adding “running shoes” as a positive broad match keyword matches queries like “running shoe,” “jogging sneakers,” “athletic running footwear,” and dozens of other variations.
Negative keywords don’t do this. If you add “running shoes” as a negative, Google blocks exactly the word “running” and the word “shoes” (in the match type behavior you selected). It does not block “running shoe” (singular), “jogging shoes” (synonym), “running sneakers” (related term), or “runnning shoes” (misspelling). Each of these must be added as a separate negative keyword if you want them blocked.
This means comprehensive negative keyword coverage requires you to add every variation manually: singular and plural forms, common misspellings, synonyms, and abbreviations. For high-impact exclusions, build a list that covers all variations rather than assuming one entry will catch everything.
Where to Apply Negative Keywords
Google Ads offers three levels for negative keyword application, each serving a different purpose.
Account-Level Negative Keywords
Apply across every campaign in your account. Use this for terms that are universally irrelevant to your business — “free,” “jobs,” “careers,” “salary,” “internship,” “login,” “password reset.” These terms should never trigger your ads regardless of campaign or product line.
Account-level negatives are managed through the account-level keyword settings. You can add up to 1,000 account-level negative keywords.
Campaign-Level Negative Keywords
Apply across all ad groups within a specific campaign. Use this for terms that are irrelevant to that campaign’s products or services but might be relevant in other campaigns. A campaign selling formal shoes might have “athletic,” “running,” and “hiking” as campaign-level negatives, while a separate campaign selling athletic shoes would not.
Ad Group-Level Negative Keywords
Apply only to a specific ad group. Use this for precise traffic routing between ad groups within the same campaign. If you have separate ad groups for “men’s running shoes” and “women’s running shoes,” you might add “women’s” as a negative in the men’s ad group and “men’s” as a negative in the women’s ad group to prevent overlap.
Negative Keyword Lists (Shared Libraries)
Shared negative keyword lists let you create a single list and apply it across multiple campaigns. This is the most efficient way to manage universal exclusions. You can create up to 20 lists per account, with up to 5,000 keywords per list.
Create lists in Google Ads under Tools & Settings > Shared Library > Negative keyword lists. Name them descriptively: “Universal Exclusions,” “Job Seeker Terms,” “Competitor Brand Names,” “Informational Intent.”
Negative Keywords in Performance Max
Google now supports campaign-level negative keywords in Performance Max campaigns — up to 10,000 per campaign. This was one of the most requested features since PMax launched and represents a major improvement in advertiser control over PMax traffic quality.
PMax negatives apply to both Search and Shopping inventory within the campaign. Add negatives through the campaign settings under “Additional settings” > “Negative keywords.” For PMax campaigns running ecommerce traffic, this is critical for filtering out informational queries, competitor terms, and job-seeker traffic that waste budget without converting.
The Search Term Report Mining Process
Negative keyword optimization is an ongoing process, not a one-time setup. The Search Terms report is where you find the queries that are actually triggering your ads — and where you identify the ones that shouldn’t be.
The Weekly Review Workflow
Step 1: Pull the report. In Google Ads, go to Insights and Reports > Search terms. Filter by the last 7-14 days.
Step 2: Sort by cost (highest first). The queries spending the most money without converting are your highest-priority negative keyword candidates.
Step 3: Identify irrelevant queries. Look for searches that triggered your ad but clearly don’t match your product or service. Common patterns: job-seeker queries, informational/educational queries, queries for products you don’t sell, queries mentioning competitors you don’t want to compete against.
Step 4: Decide the match type. If the irrelevant term is a single word that’s always irrelevant (“jobs,” “free”), add it as a negative broad match. If it’s a specific phrase where the word order matters (“how to build,” “DIY repair”), use negative phrase match. If it’s one specific query you want to block without affecting similar queries, use negative exact match.
Step 5: Add the negative and its variations. Remember: no close variant matching. Add the singular, the plural, and any common synonyms as separate entries.
Step 6: Log the addition. Keep a running record of what you added, when, and why. This prevents accidentally removing negatives later and helps you audit your lists periodically.
The Quarterly Audit
Every quarter, review your complete negative keyword lists for terms that may no longer be relevant (your product line expanded, a previously irrelevant category is now something you sell), terms that are too broad and might be blocking relevant traffic (check impression volume trends — a sudden drop after adding negatives may indicate overblocking), and gaps where new irrelevant query patterns have emerged.
Starter Negative Keyword Lists by Business Type
These lists cover the most common irrelevant query patterns. Customize them for your specific business.
Universal (All Businesses)
free, jobs, careers, career, salary, salaries, employment, hiring, internship, intern, volunteer, training, certification, course, class, tutorial, definition, wiki, Wikipedia, Reddit, Quora, PDF, download free, template free, DIY, do it yourself, how to make, how to build
Ecommerce
used, refurbished, repair, fix, broken, complaint, complaints, recall, lawsuit, coupon code, clearance, wholesale (if you’re retail only), bulk (if you don’t sell bulk), return policy, warranty claim
SaaS / B2B
free trial (if you don’t offer one), open source, free alternative, cheap, cheapest, vs (add only for competitors you don’t want to compare against), integration (for platforms you don’t integrate with), API documentation (if targeting buyers, not developers)
Local Services
DIY, how to, tutorial, near me (for locations you don’t serve — add specific city/region names), cost to (if you want to avoid price-shopping queries), average cost, cheap, cheapest, training, school, license, exam
Professional Services (Legal, Medical, Financial)
free consultation (if you don’t offer one), pro bono, legal aid, malpractice, complaint, board complaint, salary, school, degree, certification, exam
Common Mistakes to Avoid
Over-Negating
Adding too many negatives, or negatives that are too broad, silently kills your impression volume. A classic mistake: adding a single word as a broad match negative when that word appears in many relevant queries. Adding “blue” as a broad match negative because you don’t sell blue products will also block “blue chip companies” if you’re a financial services firm.
Check impression trends after adding negatives. A sudden drop suggests you’ve blocked relevant traffic.
Not Adding Variations
Because negative keywords don’t match close variants, adding “shoe” doesn’t block “shoes.” Adding “plumber” doesn’t block “plumbing” or “plumbers.” Every variation needs its own entry. For high-impact negatives, build a complete variation list: singular, plural, gerund (-ing), past tense (-ed), common misspellings.
Using Campaign-Level When Ad Group-Level Is Needed
A campaign-level negative blocks the term across every ad group. If you sell both “running shoes” and “running gear,” adding “gear” as a campaign-level negative to protect your shoe ad group also blocks it from your gear ad group. Use ad group-level negatives for traffic routing within a campaign.
Never Reviewing the Impact
After adding negatives, monitor the affected campaigns for 7-14 days. Check whether impressions dropped more than expected, whether CTR and conversion rate improved (the intended outcome), and whether any high-performing queries were accidentally blocked.
Forgetting About PMax
If you run Performance Max alongside Search campaigns, your Search campaign negatives don’t automatically apply to PMax. Add critical negatives to your PMax campaigns separately.
Bulk Management with Google Ads Editor
For accounts with extensive negative keyword needs, Google Ads Editor (a free desktop application) is significantly faster than the web interface. You can export your entire account’s negative keyword structure, edit in bulk using spreadsheet-like functionality, import negative keyword lists from CSV files, and copy negative keywords between campaigns and ad groups.
This is particularly useful when setting up a new account or performing a quarterly negative keyword audit across many campaigns simultaneously.
Frequently Asked Questions
What’s the most important thing to know about negative keyword match types?
That they don’t match close variants. This is the single biggest difference from positive keywords and the most common source of negative keyword failures. Adding “running shoes” as a negative does not block “running shoe” (singular), “jogging shoes” (synonym), or “run shoes” (variation). You must add each form separately. Every other negative keyword decision follows from understanding this fundamental behavior.
Which negative match type should I use most often?
For most advertisers, negative broad match is the workhorse. It blocks queries containing all your negative terms in any order, which efficiently covers the widest range of irrelevant searches with a single entry. Use negative phrase match when word order matters to the meaning. Use negative exact match when you need surgical precision on a specific query without risking overblocking.
Can I use negative keywords in Performance Max campaigns?
Yes. Google now supports up to 10,000 campaign-level negative keywords per PMax campaign. Add them through campaign settings under “Additional settings.” This is critical for PMax campaigns because without negatives, PMax’s broad targeting frequently triggers ads for informational queries, job-seeker terms, and other non-converting traffic that waste budget.
How many negative keywords should I have?
There’s no target number — it depends on your industry, the match types of your positive keywords, and how much irrelevant traffic your campaigns attract. Accounts using broad match positive keywords typically need more negatives than accounts using only exact match. A well-maintained account might have 100-500 negative keywords across shared lists and campaign-level settings. The right number is whatever it takes to filter irrelevant traffic without blocking relevant queries.
How often should I review and update negative keywords?
Weekly reviews of the Search Terms report are the minimum for active campaigns. Each review typically surfaces 5-15 new negative keyword candidates. Quarterly audits of your complete negative keyword lists catch overblocking issues and gaps. Campaigns using broad match positive keywords need more frequent negative keyword attention than campaigns using only exact match.
Can negative keywords hurt my campaign performance?
Yes, if you over-negate. Adding too many broad match negatives, or negatives that contain words present in relevant queries, can suppress your impression volume and prevent your ads from reaching qualified prospects. Always monitor impression trends after adding negatives. If impressions drop significantly without a corresponding improvement in CTR and conversion rate, you may have blocked relevant traffic. Use negative exact match instead of broad match when the risk of overblocking is high.
