What Are Negative Keywords? How to Optimize Your Google Ads Campaigns

Negative keywords are words or phrases you add to your Google Ads or PPC campaigns to stop your ads from showing for irrelevant search queries. They filter out the wrong audience before they click and cost you money. There are three types: negative broad match, negative phrase match, and negative exact match, each offering a different level of control over which searches trigger your ads.

You set up your campaign carefully, pick your keywords, and still get clicks from people who will never buy from you. That is the exact problem these exclusions solve.

What Is the Difference Between Negative Keywords and Positive Keywords?

Positive keywords tell Google when to show your ad. Negative keywords tell Google when not to. Both work together as a complete targeting system, and you genuinely need both to run a profitable campaign.

Feature	Positive Keywords	Negative Keywords
Function	Trigger your ads to show	Prevent your ads from showing
Goal	Reach the right audience	Exclude the wrong audience
Effect on CTR	Increases potential impressions	Improves CTR by removing irrelevant ones
Budget impact	Drives spending	Protects budget from waste
Direction	Inclusive	Exclusive

One practical detail most advertisers overlook: negative keywords only apply to the first 16 words of a search query. If a search runs longer than 16 words, any negative keyword terms appearing beyond that point will not trigger the filter, meaning your ad may still show.

What Are the Three Types of Negative Keywords?

Not all negative keywords filter the same way. Just like regular keywords, they come in match types, and the match type you choose determines how broadly or precisely your ads get filtered.

Match Type	How It Works	Example Negative	Blocked Queries	Still Shows For
Negative Broad Match	Blocks if all terms appear in any order	free shoes	“buy shoes free” / “get free shoes online”	“free sneakers”
Negative Phrase Match	Blocks if exact phrase appears in order	“cheap watch”	“buy cheap watch online”	“affordable wristwatch”
Negative Exact Match	Blocks only the exact query, no extra words	[used laptop]	“used laptop” only	“used laptop with warranty”

Broad match is the default setting in Google Ads. It is the most aggressive filter and requires careful monitoring to avoid accidentally blocking valuable traffic.

What Is Negative Broad Match and How Does It Work?

Negative broad match blocks your ad if the search query contains all the words in your negative keyword, in any order. It does not block queries that contain only some of those words.

For example, if “office chairs” is your negative broad match keyword:

This type works well for filtering out general irrelevant themes. The trade-off is the over-blocking risk. Because broad match casts the widest net, it can accidentally exclude search variations you actually want. Add broad match negatives gradually and monitor your impression share closely after each addition.

What Is Negative Phrase Match and When Should You Use It?

Negative phrase match blocks your ad when the exact phrase appears in the search query in the same word order, even if additional words appear before or after it.

Using “cheap watch” as a negative phrase match keyword:

Phrase match sits between broad and exact in terms of filtering breadth. It gives you more precision than broad match without being as narrow as exact match. It works well for blocking specific word combinations that consistently attract the wrong audience without restricting too many relevant variations.

What Is Negative Exact Match and When Is It the Right Choice?

Negative exact match blocks your ad only when the search query matches your keyword exactly, with no extra words before, after, or in between.

Using [used laptop] as a negative exact match:

This is the most precise option. Use it when you are confident that one specific search term consistently attracts the wrong audience and you want to exclude only that exact query without touching related variations. It carries the lowest risk of accidentally blocking valuable traffic, which makes it the safest starting point for advertisers who are uncertain about over-blocking.

What Are the Benefits of Using Negative Keywords in PPC Campaigns?

The benefits connect directly to each other in a chain, which is why managing these exclusions well improves your entire campaign rather than just one metric.

Here is how that chain works:

Negative keywords added → Irrelevant impressions removed → CTR increases → Google sees higher expected CTR → Quality Score rises → Ad Rank improves → CPC decreases → Budget goes further

Breaking that down into specific benefits:

A well-managed campaign can carry between 500 and 1,000 negative keywords without blocking potential customers. That number sounds high, but when you consider how many irrelevant variations exist for most keyword categories, it reflects thorough optimization rather than overreach.

How Do You Find Negative Keywords Before a Campaign Launches?

Pre-launch research prevents budget waste from day one instead of reacting after money is already spent. Most advertisers skip this step and pay for it in the first few weeks of a campaign.

Using Google Keyword Planner:

Using Google Search Autocomplete:

Brainstorming by audience: Think about who searches your keywords but would never convert:

How Do You Find Negative Keywords After a Campaign Is Running?

The Search Terms Report inside Google Ads is your most valuable post-launch resource. It shows the actual queries people typed before clicking your ad.

Navigate to the Insights and Reports tab, then click Search Terms. Apply these three data filters to identify strong negative keyword candidates:

Filter 1: Below-average CTR A search query receiving many impressions but few clicks signals a mismatch between the query and your ad. If the query is clearly irrelevant, add it as a negative. If it seems relevant but still has low CTR, the ad copy may need adjustment rather than the keyword.

Filter 2: Below-average conversion rate High clicks with low conversions mean people are visiting but not taking action. This often points to a mismatch between search intent and your landing page. Queries that consistently fail to convert despite adequate traffic volume are strong negative keyword candidates.

Filter 3: Above-average CPA If a query drives conversions but at a cost far above what your business can profitably sustain, adding it as a negative stops the bleeding even if it was technically generating some results.

Review this report weekly for active campaigns. Search behavior changes and new irrelevant queries appear regularly, especially as you expand match types or increase budgets.

Where Should You Add Negative Keywords: Account, Campaign, or Ad Group Level?

The level at which you apply a negative keyword determines how broadly it filters across your account.

Application Level	What It Controls	Best Use Case	Example
Account level	All campaigns in the account	Universal irrelevant terms	“free,” “jobs,” “DIY”
Campaign level	All ad groups within one campaign	Category-specific exclusions	“used” in a new cars campaign
Ad group level	One specific ad group only	Granular product-specific filtering	“cat” in a dog clothes ad group

Negative keyword lists in the Google Ads Shared Library allow you to build reusable exclusion sets and apply them to multiple campaigns simultaneously. Create named lists by category, such as “Brand Protection,” “Competitor Exclusions,” or “Informational Queries,” and apply them wherever relevant. This approach saves significant time when managing large accounts and ensures consistency across campaigns.

What Are the Most Common Negative Keyword Mistakes to Avoid?

Most advertisers focus entirely on the benefits of adding negatives and ignore the equal and opposite risk of adding too many or choosing the wrong match type.

What Are Negative Keyword Examples by Industry?

Industry context determines which exclusions protect budget and which would block real buyers. A one-size-fits-all list does not work across different business models.

Industry	Audiences to Exclude	Common Negative Keywords
E-commerce (premium products)	Bargain hunters, DIY users	free, cheap, discount, replica, DIY, tutorial, second-hand, how to make
B2B SaaS	Students, non-buyers	free template, open source, student, internship, certification
Local services	Job seekers, DIY enthusiasts	jobs, training, how to fix, equipment for sale, DIY
Healthcare	Self-diagnosers, home remedy seekers	symptoms, free clinic, home remedy, how to treat
Automotive (new cars)	Used car buyers, parts shoppers	used, second-hand, parts, repair, salvage
Hospitality / travel	Budget travelers, job seekers	cheap, backpacker, hostel, jobs, internship

Local service businesses should always block job-related terms from day one. The word “plumber” triggers both “plumbing services” and “plumber jobs” searches, and those two audiences have nothing in common from a conversion standpoint.

What Is the Next Step After Understanding Negative Keywords?

Negative keywords are not a one-time setup. They are an ongoing system that compounds in value the longer you run and refine them. The businesses getting the most from their paid search budgets in 2026 treat exclusion management as a regular routine rather than a campaign launch checklist item.

Start with a pre-launch list built from Google Keyword Planner and Search Autocomplete. Then open your Search Terms Report weekly and apply the three filters: low CTR, low conversion rate, and high CPA. Every irrelevant query you catch and exclude makes the next month’s budget work harder than the last.