How to Build a Negative Keyword Strategy in Google Ads (Step-by-Step)

If your Google Ads campaigns are burning through budget on clicks that never convert, irrelevant search terms are likely the culprit. You might have solid keywords, well-written ads, and a competitive bid strategy — and still watch your budget disappear on searches that have nothing to do with what you sell.

A negative keyword strategy is one of the most direct fixes available. It doesn't require you to touch your bids, rewrite your ad copy, or restructure your campaigns. You're simply telling Google which searches should never trigger your ads.

But there's a difference between adding a handful of obvious exclusions and building a real strategy. A real strategy has a diagnostic step, a categorization logic, deliberate match type choices, the right placement level, and a maintenance process that keeps it working over time. A one-time cleanup is better than nothing, but it won't hold up as your campaigns scale and Google's matching evolves.

This guide walks through exactly how to build that strategy from scratch. Each step covers a specific decision point: where to look, what to block, how to block it, where to apply it, and how to keep it current. The process works whether you're managing a single account or dozens of client campaigns.

A quick note on terminology before we dive in, because these distinctions matter throughout the whole guide. Keywords are the terms you bid on — what you add to your campaigns to tell Google what searches you want to appear for. Search terms are what users actually typed before your ad showed. Negative keywords are the terms you exclude to prevent your ad from triggering on searches that aren't relevant. These are three separate things, and conflating them leads to real mistakes when you're building exclusion lists.

With that clear, let's get into the process.

Step 1: Audit Your Search Terms Report Before Adding a Single Negative

The Search Terms Report is where your negative keyword strategy begins. This report shows you the actual queries that triggered your ads — not the keywords you're bidding on, but the real searches that caused your ads to appear and your budget to spend.

To get there in Google Ads: navigate to Campaigns > Search Keywords > Search Terms. You'll see a list of search terms alongside data like impressions, clicks, cost, and conversions.

Before you start flagging anything, set a meaningful date range. At minimum, use the last 30 days. Ideally, pull 90 days of data. A shorter window can surface one-off anomalies that don't represent real patterns. You want enough volume to see which irrelevant searches are consistently eating budget, not just the outliers.

Once you have the right date range, sort by cost. This immediately surfaces where your budget is leaking fastest. Look specifically for search terms with meaningful spend and zero conversions. These are your highest-priority exclusions — money that's already gone with nothing to show for it.

Then sort by impressions. This catches high-volume irrelevant terms that haven't cost much yet because their click-through rate is low, but they're accumulating fast. Left unchecked, these compound into real waste.

Here's the important thing about this step: don't act yet. The goal right now is purely diagnostic. You're building a picture of what's happening across your account before you start making exclusions. Jumping straight into blocking terms without a full audit leads to over-exclusion — you block something in one place and accidentally cut off valid traffic somewhere else.

Pay attention to low-spend terms with obvious intent mismatches too. Search terms containing words like "free," "DIY," "how to," or "student" might have low individual costs, but they appear repeatedly across many queries. These patterns compound over time and are worth capturing now rather than chasing later.

If you want to go deeper on why these mismatches happen in the first place, it's often a match type issue — broad match in particular is a common driver of irrelevant search term coverage.

Success indicator: You have a working list of search terms flagged as irrelevant, with cost and impression data attached. That list becomes the input for the next step.

Step 2: Categorize What You're Blocking and Why

Not all irrelevant search terms belong in the same bucket. Grouping them by category helps you apply the right fix at the right level — and builds a rationale log that's genuinely useful for client reporting and future audits.

Here are four categories that cover most of what you'll find:

Wrong intent: These are informational or research queries when your campaign is targeting buyers. Think "how to do X yourself," "what is X," or "X tutorial." The person searching isn't in purchase mode. They want information, not a product or service. This is especially common for B2B advertisers and service businesses where the same terminology is used in educational content and commercial contexts.

Wrong audience: These queries signal a buyer profile that doesn't match your offer. Common examples include "student discount," "free trial" when you don't offer one, "for kids," or "entry level." The search intent might be commercial, but the person isn't your customer. Adding these as negatives keeps your budget focused on the audience you're actually trying to reach.

Wrong product: Competitor brand names, unrelated product categories, or industry terms that don't match what you sell. If you sell project management software and you're showing for searches about construction project management, that's a wrong product match. Same with competitor names if you're not running a deliberate conquest campaign.

Brand safety: Terms that could associate your ads with content you don't want to appear alongside. This is more relevant for display campaigns, but it can apply to search in specific industries. Terms with legal, political, or sensitive connotations that have no connection to your business fall here.

Why does categorizing matter? Because each category often maps to a different scope of exclusion. Wrong intent terms might apply across your whole account. Wrong product terms might only be relevant to one campaign. Competitor names might go into a dedicated shared list. The category tells you where the negative belongs.

To illustrate: a B2B SaaS advertiser might identify "free," "open source," and "tutorial" as three separate categories. "Free" is a wrong-audience signal (they sell paid software). "Open source" is a wrong-product signal (they sell proprietary software). "Tutorial" is a wrong-intent signal (the searcher wants to learn, not buy). Each one might end up in a different list at a different level.

Keep a simple spreadsheet or document with your flagged search terms, their assigned category, and a one-line reason for exclusion. This becomes your negative keyword rationale log. When a client asks why a term was blocked six months from now, you'll have the answer.

Success indicator: Every flagged search term from Step 1 has a category and a documented reason for exclusion.

Step 3: Choose the Right Match Type for Each Negative Keyword

Negative keywords use three match types: broad, phrase, and exact. They work differently from positive keyword match types, and the distinction matters more than most guides acknowledge.

Negative broad match blocks your ad from showing when a search contains all the words in your negative keyword, in any order. If your negative broad match term is "project management," your ad won't show for "free project management software" or "management project tools." Use this with caution. Because it blocks any search containing all the words regardless of order or surrounding context, it can catch more traffic than you intend.

Negative phrase match blocks your ad when the search contains your exact phrase in that order. If your negative phrase match term is "project management," your ad won't show for "best project management software" but might still show for "management tools for projects" (the words aren't in the same order). This is the most commonly used match type for negatives and a safe default for most exclusions.

Negative exact match only blocks searches that exactly match your term, with no additional words. If your negative exact match term is "project management," it only blocks searches for literally "project management" — not "best project management software." Use this when you want to exclude one specific query without any risk of collateral exclusion.

One important clarification: there is no negative broad match modified. Negative broad match is already quite expansive, and it behaves differently from how broad match modified worked for positive keywords.

In practice, a reasonable default is to start with negative phrase match for most terms. It gives you meaningful coverage without the bluntness of broad match. Move to negative exact match when you're dealing with a term that's close to something relevant — you want to exclude the specific query without accidentally blocking related searches that do convert.

Reserve negative broad match for terms where you're confident no variation of that word combination is relevant. "Free" is a common example for paid software or premium services. Any search containing "free" is almost certainly not your buyer, so negative broad match makes sense there.

A common pitfall: adding a competitor's brand name as negative broad match when your own brand name contains similar words. If your brand is "Freeform Studio" and you add "free" as a negative broad match, you may inadvertently block searches for your own brand. Phrase or exact match is safer in those cases.

For more on how match types affect what triggers your ads, this breakdown of why ads show for wrong keywords covers the mechanics in more detail.

Success indicator: Each negative keyword on your list has a deliberate match type assigned, not just whatever the interface defaults to.

Step 4: Decide Where to Add Your Negatives

Google Ads lets you add negative keywords at three levels: ad group, campaign, and shared negative keyword lists. Getting this right prevents two common problems: under-exclusion (a term keeps triggering because you only blocked it in one ad group when it needed campaign-level coverage) and over-exclusion (you block a term at campaign level when it only needed to be blocked in one ad group).

Ad group level is the most granular. Use it when a search term is irrelevant to one specific ad group but could be relevant to others in the same campaign. For example, if you have an ad group for "enterprise software" and another for "small business software," a term like "enterprise pricing" might be fine for the enterprise ad group but irrelevant to the small business one.

Campaign level blocks the term across all ad groups within that campaign. Use this when the exclusion applies to the whole campaign's theme. If you're running a campaign for a specific product category and a search term is clearly outside that category, campaign level is the right call.

Shared negative keyword lists live in your account's Shared Library and can be applied to multiple campaigns at once. This is the right home for universal exclusions: terms like "free," "jobs," "DIY," "salary," or "how to" that you want blocked everywhere, not just in one campaign.

A practical workflow: build your master shared list for universal negatives first. Then work through your categorized list from Step 2 and assign each term to campaign or ad group level based on its scope. The category you assigned in Step 2 often tells you the level: wrong-audience terms usually belong in a shared list, wrong-product terms often belong at campaign level, and very specific query exclusions often belong at ad group level.

Name your shared lists descriptively. "Universal Exclusions," "Competitor Brand Exclusions," and "Wrong Audience Terms" are far more useful names than "Negative List 1" when you're managing multiple client accounts and need to audit quickly.

For a deeper walkthrough of how to think through this placement decision, this guide covers where to add negative keywords in Google Ads in more detail.

Success indicator: Each negative keyword has been assigned to the correct level with a clear rationale, not just added wherever was most convenient.

Step 5: Add Your Negatives in Google Ads

With your list categorized, match types assigned, and levels decided, you're ready to add the negatives. There are a few ways to do this depending on where you're working.

From the Search Terms Report: Select the search terms you want to exclude using the checkboxes, then click "Add as negative keyword." Google will prompt you to choose the level (ad group or campaign) and confirm the match type before saving. This is the fastest method when you're working through a fresh audit because you're acting directly on the data you're reviewing.

One thing to watch: when adding from the Search Terms Report, Google pre-populates the exact search term. Review the match type before saving — the default isn't always the right choice for every term on your list.

From the Keywords section: Navigate to Keywords > Negative Keywords, click the "+" button, and add terms manually. This is useful when you're adding terms that didn't come directly from the Search Terms Report — for example, terms you've identified through competitor research or industry knowledge.

For shared lists: Go to Tools > Shared Library >Negative Keyword Lists. Here you can create a new list, add terms to it, and then apply the list to the relevant campaigns. This is where your universal exclusions live. Once a shared list is applied to a campaign, any term you add to that list is automatically excluded from all campaigns it's attached to — which makes ongoing maintenance much faster.

If you have a long list of negatives to add, avoid entering them one at a time. Google Ads Editor supports bulk uploads, which is worth using when you're processing a large initial audit. Alternatively, if you're using Keywordme, you can flag and add negative keywords directly within the Search Terms Report with a single click, without leaving the Google Ads interface or exporting anything to a spreadsheet. That's particularly useful when you're working through a large list and want to stay in one place.

Once your negatives are added, verify they're live by checking the Negative Keywords tab within the relevant campaign or ad group. Shared list applications are visible in the Shared Library and in the campaign settings under "Negative keyword lists."

Success indicator: Your negative keywords are live in the correct campaigns, ad groups, or shared lists and are visible in the Negative Keywords tab.

Step 6: Build a Recurring Review Process

This is the step most guides mention briefly and then move on from. It deserves more attention, because a negative keyword strategy that isn't maintained degrades over time. Search term patterns shift as campaigns run, Google's matching evolves, and your business may change what it offers or who it targets.

Set a review cadence based on campaign activity. For new campaigns or high-spend accounts, weekly reviews make sense — you're still learning what search terms your keywords attract, and irrelevant patterns can burn significant budget before a monthly review would catch them. For stable, lower-spend campaigns, bi-weekly or monthly reviews are usually sufficient.

During each review, focus on three things:

New high-cost, zero-conversion search terms: Same filter as your initial audit — sort by cost, look for spend with no return. These are your highest-priority additions.

New high-impression irrelevant terms: Sort by impressions to catch volume that's building before it becomes expensive. Patterns often show up here before they show up in cost data.

Shared list update candidates: If you're seeing the same irrelevant term across multiple campaigns, it belongs in a shared list, not as a campaign-level negative repeated in five places.

Periodically audit your existing negatives too. Over time, some exclusions can become too aggressive. If your product offering has expanded, or you're now targeting a different audience segment, terms you blocked a year ago might actually be relevant today. A quarterly pass through your negative keyword lists to check for over-exclusion is worth building into your process.

Keep a running change log: what was added, what was removed, and when. This is especially valuable in agency settings. When a new team member takes over an account, or a client asks why traffic dropped after a change, the log gives you a clear record. A simple shared document or a tab in your campaign tracking sheet works fine.

For agencies managing multiple accounts, automating parts of the keyword management workflow is worth exploring as account volume grows. Keywordme's multi-account support means you can apply the same review workflow across clients without switching between separate dashboards.

Success indicator: You have a calendar reminder set, a documented review process, and a change log started.

Your Negative Keyword Strategy Checklist

Here's the full process as a quick reference you can return to each time you build or audit a negative keyword strategy:

Audited the Search Terms Report: Pulled at least 30 days of data (ideally 90), sorted by cost and impressions, and flagged irrelevant search terms with spend and volume data attached.

Categorized irrelevant terms: Assigned each flagged search term to a category — wrong intent, wrong audience, wrong product, or brand safety — with a documented reason for exclusion.

Assigned match types: Chose negative phrase, exact, or broad match deliberately for each term, rather than accepting the default.

Decided on placement level: Assigned each negative to ad group, campaign, or shared list based on the scope of the exclusion.

Added negatives in Google Ads: Used the Search Terms Report, Keywords section, or Shared Library depending on the type of exclusion, and verified they're live.

Set a recurring review cadence: Scheduled regular Search Terms Report reviews and started a change log to track additions and removals over time.

Negative keywords aren't a one-time task. They're an ongoing part of keeping your campaigns healthy. The initial audit gets you to a clean baseline. The recurring review process keeps it clean as your campaigns evolve.

If you want to move through the Search Terms Report faster — especially when managing multiple accounts or large keyword lists — start your free 7-day trial of Keywordme. It lets you remove junk search terms, build high-intent keyword lists, and apply match types instantly, right inside Google Ads, without spreadsheets or tab-switching. After the trial, it's $12/month per user.

For more on the fundamentals behind this process, why negative keywords matter for campaign performance and where to find negative keywords are worth reading alongside this guide.