Negative keywords are a central, yet often underestimated, element of search engine advertising, especially within Google Ads.
While most advertisers focus heavily on selecting the right keywords, working with negative keywords is about the opposite: excluding the searches you do not want to appear for.
Correct use of negative keywords can be decisive for budget control, relevance, and overall performance in paid search campaigns.
In this post, we take a closer look at what negative keywords are, why they matter, how they are used in practice, and the benefits and challenges associated with them.
What are negative keywords?
Negative keywords are keywords or keyword phrases that you actively exclude from your advertising campaigns.
When a user performs a search that contains a negative keyword, your ad will not be shown, regardless of how relevant the rest of the search might be.
The purpose of negative keywords is to prevent your ads from appearing for irrelevant searches that do not match your offering, your target audience, or your business objectives.
In this way, you ensure that your advertising budget is spent on searches that are more likely to lead to conversions.
A classic example is a company that sells exclusive leather shoes. If the company advertises on the keyword “leather shoes”, the ad may also appear for searches such as “cheap leather shoes” or “free leather shoes”.
If the company does not want to target price sensitive users, the words “cheap” and “free” can be added as negative keywords.
Why negative keywords are important
Negative keywords play a crucial role in optimizing search campaigns.
Without them, advertisers risk paying for clicks from users who never intended to buy, sign up, or engage with the business.
There are several reasons why negative keywords are important.
First, they contribute to better relevance.
When your ads are shown only for relevant searches, the connection between keyword, ad, and landing page becomes stronger.
This improves the user experience and increases the likelihood that the user takes the desired action.
Second, negative keywords help protect the advertising budget.
Irrelevant clicks can quickly become expensive, especially in industries with high competition and high cost per click.
By excluding irrelevant searches, you reduce waste and ensure that the budget is used more efficiently.
Finally, negative keywords have an indirect impact on Quality Score in Google Ads.
When your ads achieve higher relevance and stronger performance, this can lead to higher Quality Scores, lower click prices, and better ad positions.
Types of negative keywords
Like regular keywords, negative keywords can be applied using different match types.
Understanding these is important, as they have a significant impact on which searches are excluded.
Broad match (negative)
Negative keywords with broad match exclude searches that contain all the words in your negative keyword, regardless of order. Synonyms and variations are not included.
For example, if you add “running shoes women” as a negative broad match, your ad will not be shown for searches that contain both “running shoes” and “women”.
Phrase match (negative)
With negative phrase match, searches that contain the exact phrase in the specified order are excluded. Words may appear before or after the phrase.
If you add “free trial” as a negative phrase match, your ad will not be shown for searches such as “free trial subscription”, but it may still appear for “trial free subscription”, as the word order is different.
Exact match (negative)
Negative exact match is the most restrictive option. Only searches that match the keyword exactly, with no additional words, are excluded.
If “used shoes” is added as a negative exact match, the ad will only be excluded for that exact search, but not for “used shoes men”.
The choice of match type depends on how broad or precise the exclusion needs to be and often requires ongoing adjustment based on data.
How to find negative keywords
Identifying negative keywords is a continuous process rather than a one time task.
The most effective negative keywords are typically found through analysis of actual user behavior.
The search term analysis
One of the most important tools in Google Ads is the search terms report. Here, you can see the actual searches that triggered your ads.
The report provides detailed insight into which search terms users are using and which ones lead to clicks and conversions.
By reviewing the report, you can identify searches that are irrelevant, have a high click through rate but low conversion rate, or generally do not match your business.
These searches are strong candidates for negative keywords.
Read more about keyword analysis in my post here.
Business understanding and audience insight
Negative keywords can also be identified based on knowledge of the business and the target audience.
For example, if you know that you do not offer support, jobs, free products, or certain services, these terms can be added as negative keywords from the start.
This could include words such as “job”, “career”, “support”, “manual”, “free”, “used”, or “DIY”, depending on your industry and offering.
Competitor and market analysis
Reviewing competitors’ offerings and positioning can also provide inspiration for negative keywords.
If your business differentiates itself on price, quality, or target audience, it may be relevant to exclude searches that clearly indicate a different need than the one you serve.
Read more about how to use benchmark analysis here.
Benefits of working with negative keywords
Working with negative keywords can provide several clear benefits for your advertising campaigns.
One of the biggest advantages is increased efficiency.
When irrelevant searches are removed, campaigns become more focused, and the advertising budget is spent on users with higher purchase intent.
In addition, performance metrics such as click through rate, conversion rate, and return on ad spend tend to improve.
Ads shown in relevant contexts generally achieve better engagement and stronger results.
Negative keywords also contribute to better control and governance.
You gain greater influence over how and when your ads appear, which is especially important in complex account structures with many campaigns and ad groups.
How to avoid excluding valuable traffic with negative keywords
Although negative keywords offer many advantages, they also come with challenges.
One of the biggest risks is excluding too much. If negative keywords are applied too aggressively or without sufficient analysis, it can result in lost relevant traffic and missed conversions.
In addition, working with negative keywords requires ongoing maintenance.
Search behavior changes over time, and new search terms constantly emerge. Without regular analysis, campaigns risk becoming either too broad or too narrow.
Finally, managing negative keywords across campaigns and ad groups can be complex.
Especially in larger accounts, a clear structure and proper documentation are essential to avoid overlap and unintended exclusions.
Negative keywords at campaign and account level
Negative keywords can be added at both campaign level and account level, and this choice has a significant impact on flexibility.
Campaign level negative keywords are often used when certain searches are irrelevant for a specific campaign but may still be relevant in other contexts.
Account level negative keywords are typically used for general exclusions that are never relevant to the business, such as “free”, “job”, or “support”.
A well considered division ensures that negative keywords support the account structure rather than unnecessarily limiting it.
Best practice for working with negative keywords
To get the most out of negative keywords, they should be an integral part of ongoing optimization.
It is recommended to review the search terms report regularly, especially during periods of campaign changes or budget adjustments.
At the same time, new negative keywords should be tested gradually rather than implemented in large quantities all at once.
Documentation and structure are also important, particularly if multiple people are working on the same advertising account.
Clear guidelines for where and how negative keywords are applied can help prevent errors and inefficiencies.
Et essentielt værktøj i søgemaskineannoncering
Negative keywords are an essential tool in search engine advertising and play a decisive role in relevance, performance, and budget management.
By excluding irrelevant searches, businesses can ensure that their ads reach the right audience at the right time.
Working with negative keywords requires continuous analysis, business understanding, and structure, but the effort pays off in the form of stronger results and more effective digital marketing.
It is not about limiting visibility, but about making it more precise and more valuable.
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