Negative keywords list in Google Ads: Complete guide to blocking wasted traffic & improving ROI

Abisola |

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Negative Keywords List is one of the most effective tools in your Google Ads account, and one of the most overlooked.

While many marketers consider which keywords to target, the ones they exclude often determine how successful their campaigns will be.

According to WordStream, the average Google Ads CTR across all industries is 6.11%. However, not all these clicks are valuable; a good chunk come from searches with no conversion intent whatsoever.

The main cause for underperforming campaigns is wasted budget on unnecessary traffic, and creating a comprehensive negative keyword list is the solution.

In this article, we’ll cover everything from its definition to how to create a negative keywords list and maintain it throughout the campaign.

What is a negative keyword list in Google Ads?

Negative keywords are a list of terms that you tell Google Ads to ignore in search queries that should not trigger your ad to show.

In other words, if a person searches with any term you have listed in the negative keyword section, your ad will not be triggered by such terms.

It can be considered as a sieve. While your positive keywords help you target the audience you are trying to attract, the negative keywords help you weed out the rest.

For instance, suppose you are selling the best noise-canceling headphones in the market. You can place a bid on “best headphones.”

However, without a negative keyword list, your ad may appear in searches like “cheap headphones,” “free headphones,” or “headphones for kids”, all of which are not your target audience.

Why is a negative keywords list important for Google Ads campaigns?

Blocking unnecessary searches not only makes sense but will lead to performance improvement, and usually, right away.

The reason is simple: once your ads stop appearing for irrelevant searches, CTR increases because the people seeing them are interested in what you have to offer.

This, in turn, increases your conversion rate. Cost per acquisition goes down for the same reason: less money is spent on ads shown to uninterested people.

According to Google itself, the first reason for poor PPC campaign results is irrelevant traffic. Negative keywords solve the problem immediately.

How does a negative keyword list work in Google Ads?

The most obvious indicators will be found in the data over time. After implementing a large number of negatives, you can anticipate the following results:

  • Impressions will decrease: This is natural and positive; you are reaching fewer people through fewer searches.
  • CTR will increase: the visitors are becoming more qualified and thus are more likely to click on the ad.
  • Conversion rate will increase: visitors who are a better fit are more likely to convert.
  • CPA will decrease: you will be spending less to generate conversions.

However, if both impressions and conversions are decreasing, you may have gone too far with your negatives.

Look at the Search Terms Report to see which legitimate search terms were cut off by your changes.

What types of negative keywords can you use?

Negative keywords work in the same way as normal keywords, but in the opposite way. The match type to use is critical because being too broad can inadvertently block traffic.

Negative broad match

Is the default, for example, if you create a negative broad match term of "free", your ad will not appear when a search contains the word "free" anywhere in the search and is combined with other keywords.

Negative phrase match

Stops your ad from showing if the search includes your phrase in the same order. If you choose to exclude "free trial" as a negative phrase match, your ad will not run for "download free trial software", but it will still run for "trial software free download" because the phrase is not in sequence.

Negative exact match

It is the most precise: your ad won't show if the search exactly matches your negative term, but it will if it includes other words.

This is the most precise and helpful if you want to exclude a very specific search you don't expect others to use.

Most advertisers use all three. Exact match negatives handle high-volume waste. Negative phrase match handles intent words like "free," "cheap", or "DIY". Broad match negatives exclude entire categories.

How do you build a negative keywords list from scratch?

Negative keywords work in the same way as normal keywords, but in the opposite way. The match type to use is critical because being too broad can inadvertently block traffic.

Negative broad match is the default

For example, if you create a negative broad match term of "free", your ad will not appear when a search contains the word "free" anywhere in the search and is combined with other keywords.

Negative phrase match

Stops your ad from showing if the search includes your phrase in the same order. If you choose to exclude "free trial" as a negative phrase match, your ad will not run for "download free trial software", but it will still run for "trial software free download" because the phrase is not in sequence.

Negative exact match

It is the most precise. Your ad won't show if the search exactly matches your negative term, but not if it includes other words.

This is the most precise and helpful if you want to exclude a very specific search you don't expect others to use.

How should you structure a negative keywords list in Google Ads?

Negative keywords work at three levels in Google Ads: ad group, campaign and account. Knowing which level to use matters.

Ad group-level keywords only apply to a particular ad group

This is best when you need more precision control. If you have one ad group targeting "enterprise software" and another targeting "small business software," you could add "small business" to the enterprise ad group to avoid overlap.

Campaign-level negatives apply to all ad groups in a campaign

It is the default level and is suitable for intent-based exclusions for this campaign objective.

Account-level (shared negative lists) apply to multiple campaigns

If you have multiple campaigns and they should all exclude the same terms, competitor names, unrelated job titles, and non-buying keywords, this helps save time and keep things consistent. Create the list and link it to multiple campaigns.

So for most campaigns, a combination approach is recommended: shared (account) negative list for exclusions across all campaigns, campaign negatives for intent, and ad group negatives if needed.

What negative keywords should e-commerce advertisers add first?

The industry context will determine which negatives are most relevant. This is what the starting framework will look like for each category:

  • E-commerce: free shipping (if you don’t have that feature), used, second-hand, wholesale, bulk, sample, return policy (educational), cleaning instructions, repairing instructions
  • Software B2B: open-source, free, crack, download, trial (if you don’t provide a trial version), internships, courses, certifications, tutorials, API documentation
  • Local services: national, international, DIY, self-service, online-only, template, software, apps

How often should you update your negative keywords list?

You should update your negative keywords list regularly, not just once and forget it. A good rule is:

  1. Weekly (for active campaigns): If you’re running ongoing Google Ads campaigns, check your search terms report every week. This helps you quickly catch irrelevant searches that are already wasting budget.
  2. Monthly (minimum standard): At least once a month, do a deeper review. Look for patterns such as repeated irrelevant queries, new trends in how people search, or keywords that keep slipping through.
  3. After any major change in campaign or product: Whenever you launch a new product, change your targeting, or expand to new locations, review your negative keywords. New campaigns often attract unexpected search terms.
  4. Whenever performance drops or spend increases unexpectedly, if clicks go up but conversions don’t, your negative keyword list is one of the first places to check.

What is the difference between a negative keywords list and invalid clicks?

They are related to controlling ad waste, but they solve completely different problems in Google Ads.

Negative keyword list

A negative keyword list is a list you set up intentionally to prevent your ads from showing for certain searches.

  • It prevents irrelevant traffic before the click happens
  • You choose words you don’t want your ads to appear for
  • Example: if you sell luxury shoes, you may add “cheap” or “free” as negative keywords so your ad won’t show for those searches

Purpose: improve targeting and avoid wasting budget on the wrong audience

Invalid clicks

Invalid clicks are clicks that are not legitimate or not useful, and they are usually not under your control directly.

They can include:

  • Bots or automated traffic
  • Accidental repeated clicks
  • Fraudulent or malicious activity

Google usually filters them out and may not charge you for most of them.

Purpose: These are a problem Google tries to detect and remove, not something you set up manually.

Negative keywords list vs. audience exclusions: what's the difference?

Feature Negative keywords Audience exclusions
What it blocks Search queries Types of users
Based on What someone searches for Who someone is
Best used for Intent mismatch Demographic mismatch
Works in Search campaigns Search, Display, YouTube
Granularity Keyword level Audience segment level
Example Blocking "free" Excluding existing customers

How to turn a negative keywords list into a long-term competitive advantage

Negative keyword lists are not something you set once and forget; rather, they are a dynamic process that differentiates good campaigns from bad.

The rule is straightforward: every keyword that causes your ad to appear should have the potential to drive a conversion. Nothing else belongs on your negative keyword list.

Begin by universally excluding irrelevant intents, add competitors' names and irrelevant categories, and establish a review process for your negative keyword lists.

Utilize shared lists to maximize efficiency when applying your negative keyword lists across multiple campaigns.

Perform two-way audits by reviewing both sides to update your negative keyword lists accordingly. Every dollar you save on irrelevant clicks is a dollar you can spend on relevant clicks.

Frequently Asked Questions

  • How many negative keywords should you have?

    The right count depends on search volume and match types, not a fixed target. Some accounts need dozens, others hundreds. Quality beats quantity: fifty precise negatives that block irrelevant queries outperform five hundred broad blocks that accidentally suppress valuable traffic.

  • Can negative keywords hurt campaigns?

    Yes, especially over-broad negatives. Adding a word like best as a broad negative can hide relevant queries you still want. After bulk changes, review the Search Terms Report and conversion data to catch accidental blocks before they starve high-performing keywords.

  • Can you use negatives in Performance Max?

    Partially. Performance Max supports campaign-level negative keywords but offers less granularity than Search campaigns. Because PMax automates placements, invalid traffic risk can rise, making exclusion management and search term monitoring important even when you cannot control every placement surface individually.

  • How do negatives differ from search term exclusions?

    They serve the same goal at different stages. Negative keywords prevent future auctions on unwanted queries before your ad shows. Search term exclusions react after you see what already triggered an impression. Both belong on a maintained list tied to your offer and geography.

  • Do negative keywords affect Quality Score?

    Indirectly, yes. Filtering irrelevant searches improves click-through rate because fewer mismatched users see your ads. Higher expected CTR contributes to Quality Score over time, which can lower cost per click. Negatives are a hygiene tool, not a direct Quality Score input in Google's formula.

  • How often should you review negative lists?

    Check monthly at minimum, weekly on high-spend or broad match campaigns. Mine the Search Terms Report for non-converting queries to add, and audit quarterly for outdated blocks that may now be valuable. Seasonal offers often need temporary negatives added and removed.

Abisola

Abisola

Abisola handles content and support at ClickPatrol. She helps customers get more value from cleaner traffic data and writes practical resources about ad fraud, fake traffic, and smarter PPC decisions.

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