📋 Overview
Negative keywords tell Amazon which search terms should not trigger your ads, preventing your budget from being spent on clicks that will never convert. Used correctly, they are one of the highest-leverage levers in Amazon PPC — reducing wasted spend, improving your Advertising Cost of Sales (ACoS), and sharpening the relevance of every dollar you put into campaigns.
This article explains how negative keywords work, when to add them, how to choose the right match type, and how to build a sustainable review process that keeps your campaigns profitable without inadvertently strangling your reach.
🎯 Who This Is For
🌱 Beginner sellers
- You have launched your first Sponsored Products campaigns and are seeing spend but few conversions.
- You want to understand what negative keywords are and how to add them safely without breaking your campaigns.
- You are running auto-targeting campaigns and have not yet done a search term audit.
🚀 Advanced sellers
- You manage multiple campaigns across several ASINs and want a systematic negative keyword workflow.
- You are building campaign structures (e.g., auto-to-manual funnels) that rely on negatives to route traffic correctly.
- You want to reduce ACoS without sacrificing impression share on high-converting terms.
🔑 Key Concepts You Need to Know
📌 Search Term vs. Keyword
A keyword is what you bid on inside a campaign. A search term is the actual phrase a shopper typed into Amazon’s search bar. One keyword can match dozens of different search terms. Negative keywords work at the search term level — they prevent specific shopper queries from triggering your ads.
📌 Negative Keyword Match Types
Amazon offers two negative match types:
- Negative Exact: Blocks only the precise phrase the shopper typed, including the same word order and no extra words. Adding dog collar as Negative Exact blocks the query “dog collar” but not “large dog collar.”
- Negative Phrase: Blocks any query that contains your negative phrase as a consecutive sequence of words, in that order. Adding dog collar as Negative Phrase blocks “large dog collar,” “red dog collar with buckle,” and “dog collar for puppies.”
There is no Negative Broad match type on Amazon. Negative Phrase is your broadest available option and therefore requires more caution.
📌 Campaign-Level vs. Ad Group-Level Negatives
Negative keywords can be applied at the campaign level (affecting all ad groups within that campaign) or the ad group level (affecting only a single ad group). Campaign-level negatives are more efficient when a term is irrelevant to everything in the campaign. Ad group-level negatives are better for routing traffic between ad groups without excluding it from the campaign entirely.
📌 Negative Keyword Lists
Amazon allows you to create Negative Keyword Lists in the Advertising console. A single list can be linked to multiple campaigns, making it easy to apply and update a master set of irrelevant terms across your entire account without editing each campaign individually.
📌 ACoS and TACoS
ACoS (Advertising Cost of Sales) is ad spend divided by attributed ad revenue, expressed as a percentage. TACoS (Total Advertising Cost of Sales) is ad spend divided by total store revenue (organic + paid). Negatives directly reduce wasted spend, which improves ACoS. Because better ad efficiency can also lift organic rank over time, TACoS often improves as well.
🛠️ Step-by-Step Guide
1️⃣ Pull Your Search Term Report
In Seller Central, navigate to Reports → Advertising Reports. Select Sponsored Products as the ad type and Search term as the report type. Set the date range to at least the last 60–90 days to capture enough data. Download the report as a spreadsheet.
If you use the Amazon Advertising console directly, you can access the same report under Measurement & Reporting → Sponsored Products Reports.
💡 Pro Tip: Use a 90-day window for established campaigns. For newer campaigns (under 30 days), a shorter window is fine — just be more conservative about adding negatives until you have statistically meaningful data.
2️⃣ Filter for High-Spend, Zero-Conversion Search Terms
Open the report in a spreadsheet tool. Sort or filter by Spend (descending). Look for search terms that have accumulated meaningful spend but zero orders and zero conversions. A common threshold is any term that has spent more than 1–2x your target cost-per-order without generating a sale.
- Example: If your target cost-per-order is $15, flag any search term that spent more than $15–$30 with zero conversions.
- Also flag terms with very high spend relative to their orders (e.g., 10 clicks, 0 orders, $25 spent on a $10 product).
💡 Pro Tip: Do not filter on clicks alone. A term with 50 clicks and 0 orders is more meaningful data than a term with 3 clicks and 0 orders. Prioritize by spend, not click count.
3️⃣ Evaluate Relevance Before Negating
Before adding a term as a negative, ask yourself: Is this query genuinely irrelevant to my product, or did it just not convert in this window by chance?
- Clearly irrelevant: Wrong product category, wrong audience, wrong intent (e.g., “DIY plans” on a finished furniture listing). Add as a negative.
- Relevant but underperforming: The term matches your product but the conversion rate is low. Consider whether the listing, price, or images are the real problem before negating.
- Brand or competitor terms: Decide intentionally — some sellers negate competitor brand names, others do not. Make a conscious choice rather than negating by default.
4️⃣ Choose the Right Negative Match Type
Use this decision framework:
- Use Negative Exact when you want to block a specific query but keep related, longer variations. This is the safer default for most situations.
- Use Negative Phrase only when you are confident that any search containing that phrase is irrelevant. For example, if you sell premium handmade goods, you might add “cheap” as Negative Phrase to block “cheap [product],” “buy cheap [product],” etc.
When in doubt, start with Negative Exact. You can always expand to Negative Phrase later.
5️⃣ Add Negatives at the Right Level
In the Amazon Advertising console, navigate to the campaign or ad group where the wasted spend occurred. Go to Negative Keywords and add your terms.
- Add at the campaign level if the term is irrelevant to every product in that campaign.
- Add at the ad group level if you want to prevent the term from triggering one specific ad group but still allow it in another.
- For terms that are universally irrelevant across your account (e.g., “free,” “DIY,” unrelated categories), add them to a Negative Keyword List and apply that list to multiple campaigns at once.
💡 Pro Tip: Build a master “Account Exclusions” Negative Keyword List early in your advertising journey. Start with obvious irrelevant categories and grow it over time. Linking it to every new campaign saves significant cleanup work later.
6️⃣ Use Negatives to Route Traffic in Auto-to-Manual Funnels
A common advanced structure pairs an auto-targeting campaign (for discovery) with a manual exact-match campaign (for harvested winners). Once a search term from the auto campaign has proven itself with conversions, you:
- Add it as a positive exact-match keyword in your manual campaign at a competitive bid.
- Add it as a Negative Exact in your auto campaign so traffic for that term routes to the manual campaign where you control the bid more precisely.
This prevents the two campaigns from competing against each other for the same query and lets you bid more aggressively on proven terms.
7️⃣ Build a Recurring Review Cadence
Negative keyword management is not a one-time task. Build it into a regular schedule:
- Weekly (new or high-spend campaigns): Quick scan of the Search Term Report for obvious irrelevant spend. Add clear negatives only.
- Monthly (all active campaigns): Full analysis using the 30-day window. Evaluate borderline terms with enough data to decide.
- Quarterly: Audit your existing negative lists. Remove any negatives that may have been added too aggressively and are blocking valuable traffic.
💡 Pro Tip: Track every negative keyword you add in a simple spreadsheet with the date added, the campaign, and the reason. This log makes quarterly audits fast and helps you avoid re-adding terms you previously removed intentionally.
📖 Real-World Examples
🧩 Scenario 1: Beginner Seller Cuts Wasted Spend on an Auto Campaign
Seller: A new seller with one product — a stainless steel water bottle — running a single auto-targeting Sponsored Products campaign with a $20/day budget.
Problem: After 60 days, ACoS was 78%. A search term report showed over $45 spent on queries like “plastic water bottle,” “kids sippy cup,” and “water bottle BPA free for toddler” — none of which matched her stainless steel, adult-focused product.
Action: She added “plastic,” “sippy cup,” “toddler,” and “kids” as Negative Phrase at the campaign level. She also added “BPA free” as Negative Exact after confirming her product had no BPA-free certification listed.
Result: Over the following 30 days, spend on those irrelevant queries dropped to zero. ACoS fell meaningfully without any changes to bids or budget. Conversion rate on remaining traffic improved because the ads were reaching more relevant shoppers.
🧩 Scenario 2: Experienced Seller Uses Negatives to Isolate Top Performers
Seller: An established brand selling yoga mats, managing eight campaigns across three product lines.
Problem: His auto campaign and broad-match manual campaign were both triggering for “eco yoga mat cork” — a high-converting term. The two campaigns were competing against each other in auction, driving up his own CPC and splitting attribution data, making it hard to optimize bids.
Action: He added “eco yoga mat cork” as a Negative Exact in both the auto campaign and the broad-match campaign, then placed it as a Positive Exact keyword in a dedicated exact-match campaign with a higher, more controlled bid.
Result: CPC on that term dropped because internal competition was eliminated. Conversion data consolidated into one campaign, making bid adjustments straightforward. Overall blended ACoS across the product line improved noticeably.
🧩 Scenario 3: Seller Avoids Over-Negating and Recovers Lost Traffic
Seller: A mid-size seller of kitchen knives who aggressively added “set” as a Negative Phrase to block “knife set” queries, believing buyers searching for sets would not convert on a single knife listing.
Problem: Impressions and sales dropped significantly the following week. A closer review revealed that many high-converting queries had contained the word “set” — including “chef’s knife and cutting board set” and “knife set gift” — even though the shopper ultimately purchased the single knife after clicking the ad.
Action: She removed “set” as a Negative Phrase and replaced it with more targeted negatives: specific low-performing queries like “12 piece knife set” and “beginner knife set under $20.”
Result: Traffic and sales recovered within two weeks. The more surgical negatives still blocked genuinely irrelevant queries while preserving the valuable intent-adjacent traffic she had accidentally cut.
⚠️ Common Mistakes to Avoid
❌ Negating Too Broadly with Negative Phrase
Why sellers do it: Negative Phrase feels efficient — block one word or phrase and eliminate an entire category of irrelevant queries at once.
The problem: Short phrases appear in many search queries, including highly relevant ones. Adding “cheap” as Negative Phrase might also block “not cheap quality,” “not-cheap alternatives,” or shoppers whose full query happens to include the word incidentally.
What to do instead: Default to Negative Exact for most terms. Only use Negative Phrase when you have reviewed several variations of the phrase in your search term report and confirmed they are all irrelevant.
⚠️ Acting on Too Little Data
Why sellers do it: A new campaign shows a few clicks with no sales, and the seller panics and negates everything that has not converted.
The problem: Low click counts are statistically unreliable. A term with 4 clicks and 0 orders has not “proven” itself irrelevant — it simply hasn’t had enough exposure to convert yet.
What to do instead: Set a minimum spend or click threshold before negating. A common rule of thumb is to wait until a term has spent at least 1–2x your average cost-per-order before treating zero conversions as a signal.
🚫 Never Auditing Existing Negatives
Why sellers do it: Negatives feel like a “set it and forget it” fix. Once added, sellers rarely revisit them.
The problem: Your product, your listing, and the competitive landscape evolve. A term that was genuinely irrelevant 12 months ago (perhaps because you didn’t carry that variation) might now be highly relevant after a product expansion or listing update. Accumulated negatives can silently suffocate reach over time.
What to do instead: Schedule a quarterly negative keyword audit. Review your existing lists and remove any terms that no longer make sense given your current catalog and strategy.
❌ Adding Negatives Without Documenting Them
Why sellers do it: It seems like unnecessary overhead when you “know” why you added the term.
The problem: When campaigns are later reviewed, inherited, or audited — by you, a colleague, or an agency — there is no way to tell whether a negative was added intentionally for good reason or accidentally during a bulk upload. Re-adding a term you already removed on purpose causes the same problem twice.
What to do instead: Maintain a simple change log. Record the term, the match type, the campaign, the date, and a one-line reason. Even a basic spreadsheet is sufficient.
⚠️ Confusing Campaign-Level and Ad Group-Level Application
Why sellers do it: The Amazon UI allows negatives at both levels, and sellers often add them at whichever level they happen to be working in at the time.
The problem: Adding a negative at the campaign level blocks that term for every ad group in the campaign — which may include ad groups for which the term is actually valuable. Conversely, adding a term at the ad group level when you intend to block it campaign-wide means it will still trigger in other ad groups.
What to do instead: Before adding a negative, consciously ask: “Should this block all ad groups in this campaign, or only this specific one?” Then apply it at the correct level.
📈 Expected Results
When you implement a disciplined negative keyword strategy and maintain it consistently, you can expect to see improvements across several dimensions:
- Lower ACoS: Eliminating spend on non-converting queries directly improves your advertising cost-to-revenue ratio, often within the first 30 days of regular cleanup.
- Higher Conversion Rate: Because your ads are shown to more relevant shoppers, the percentage of clicks that result in purchases increases — improving your account quality signals with Amazon’s algorithm.
- More Efficient Budget Utilization: Budget that was previously consumed by irrelevant traffic reallocates to auctions where your product is genuinely competitive, extending effective reach without increasing total spend.
- Cleaner Campaign Structure: Over time, your auto campaigns surface better keyword candidates because wasted traffic patterns are filtered out, making your search term reports easier to read and act on.
- More Predictable Scaling: Campaigns with well-managed negatives have more stable performance data, making bid optimization and budget decisions more reliable as you scale.
Results compound over time. Sellers who establish a monthly review cadence and maintain a negative keyword log consistently outperform those who treat negative keyword management as a one-time setup task.
❓ FAQs
🙋 Can negative keywords hurt my organic ranking?
Negative keywords only affect paid ads — they have no direct effect on organic search results. However, if you negate a high-volume keyword entirely, you may reduce total clicks and sales velocity on that keyword, which could indirectly slow organic rank growth over time. This is another reason to negate carefully and surgically rather than broadly.
🙋 Do negative keywords work in Sponsored Brands and Sponsored Display campaigns?
Yes. Negative keywords are available in Sponsored Brands campaigns. Sponsored Display uses audience and product targeting rather than keyword targeting, so negative keywords do not apply there — instead, you manage exclusions through negative product targeting or audience refinements.
🙋 How many negative keywords is too many?
Amazon allows up to 1,000 negative keywords per campaign and up to 10,000 per Negative Keyword List. There is no hard rule on “too many,” but if your campaigns have hundreds of negatives and you are still not seeing improvement, the issue is more likely bid strategy or listing quality. Negatives are a filter, not a substitute for fundamentally competitive positioning.
🙋 Should I add competitor brand names as negative keywords?
This is a strategic choice, not a technical one. Some sellers negate competitor brand names to avoid wasting spend on shoppers who have strong brand intent for a competitor. Others deliberately target competitor searches as a conquest strategy. There is no universal right answer — it depends on your category, your margin, and how often those queries convert for your product. Check your Search Term Report to see whether competitor brand terms actually convert for you before deciding.
🙋 What is the difference between adding a negative keyword and simply pausing a keyword?
Pausing a keyword stops you from actively bidding on that keyword in a manual campaign — but it does not prevent other keywords in the same campaign (especially broad or phrase-match keywords) from matching that same search term. A negative keyword directly blocks a specific search query from triggering your ad regardless of which positive keyword would have matched it. For true exclusion, you need a negative keyword, not just a paused positive keyword.