Negative keywords in Google Ads explained

The short answer

A negative keyword is a word or phrase that stops your Google Ads ad from showing on searches containing it. For example, adding the word free as a negative keyword stops ads showing on searches with that word. Find candidates in your search terms report, add them at the right level, and review them regularly to avoid blocking good searches.

What are negative keywords?

In Google Ads you choose keywords that tell Google when your ad may appear. A negative keyword does the opposite job. According to Google's own help pages, it prevents your ad from being triggered by a certain word or phrase, so your ads are not shown to anyone searching for that phrase. Google's example is adding the word free as a negative keyword, so that the ad is not shown for searches that include it.

The reason to use them is relevance. Keyword matching is not exact, and your ad can appear for searches you did not expect. If you sell paid training courses, you probably do not want clicks from people looking for free ones. If you repair laptops, you may not want people searching for laptop jobs or laptop wallpapers. Each unwanted click costs money and brings nothing back.

Negative keywords do not make your ads more persuasive. They only narrow who sees them. The broader picture of how bids, budgets and the auction work is in the guide to how Google Ads works for small businesses.

Match types for negative keywords

Negative keywords have match types, and they behave differently from the ones on your normal keywords. Check the current documentation before relying on this summary, because details can change.

• Negative broad match: the ad will not show when the search contains all the words of the negative keyword, in any order. Searches with only some of the words may still trigger the ad.
• Negative phrase match: the ad will not show when the search contains the words in the same order, even if there are extra words around them.
• Negative exact match: the ad will not show when the search is that exact phrase, with no extra words.

The point that surprises most people is that negative keywords do not match close variants. Google's help pages explain that misspellings, plurals and other forms are not automatically covered. A negative keyword for house blocks searches for red house but may not block blue houses. If you want to block variants, add them.

Also note that a negative keyword that overlaps with one of your normal keywords will stop that keyword from showing your ad. That is a common cause of campaigns that suddenly deliver less.

Where negative keywords can be added

Google lets you add negatives at several levels, and the level changes the effect.

• Ad group: applies to one group of closely related keywords.
• Campaign: applies to everything in that campaign.
• Shared lists: a list you build once and attach to chosen campaigns.
• Account level: a single list that applies across relevant campaigns in the account, which Google's help pages say covers several campaign types, including Search, Performance Max and Shopping.

Use the narrowest level that does the job. A word that is irrelevant for one service might be valuable for another. Putting it at account level could block good traffic elsewhere. Reserve account-level and shared lists for terms that are never wanted, such as obvious job-seeker terms or words that always signal the wrong intent for your whole business.

How do I find negative keywords?

Start with real data rather than guesses. The search terms report in Google Ads shows the actual searches that triggered your ads. Review it weekly at first and then monthly.

1. Open the report for a date range with enough clicks to be meaningful.
2. Sort by spend or clicks.
3. Mark searches that clearly have the wrong intent: unrelated products, job seekers, students, free or DIY seekers if you sell a paid service, a location you do not serve.
4. Look for words repeated across several bad searches. A single word is often a better negative than a whole phrase.
5. Check whether the same words ever appear in searches that led to enquiries or sales. If so, do not block them.
6. Add the negatives at the right level and match type, and record the date.

Ask the people who answer enquiries too. Sales notes often reveal the wrong searches faster than any report, which is why the guide to lead generation for small businesses stresses tracking what happens after the click.

You can also build a starter list before launch by thinking through how the wrong person would describe what you offer. Brainstorm the words that signal a different intent, and add them carefully rather than all at once.

What is the risk of adding too many?

Negative keywords are a blunt tool, and over-blocking is a real cost. Each one can silently remove traffic you wanted, and you will not see it, because the missing impressions never appear in a report.

The main risks are these.

• Blocking good searches. A word that looks irrelevant, such as cheap or near, may belong to a buyer in your market.
• Conflicts with your own keywords, which stops those keywords from working.
• Shrinking volume so far that the account cannot learn. Automated bidding needs data.
• False confidence. A very long negative list can feel like control, but it often hides problems with ad text or landing pages that actually cause the poor traffic.

Reduce the risk by adding in small batches, writing down why each term was added, and checking volume and conversions afterwards. Review the list every quarter and remove anything you added on a hunch. Google's help pages also warn that negatives are less precise on Display than on Search, so do not expect the same results there.

Negative keywords in automated campaigns

Automated campaign types give you less control over search matching. Google's guidance for Performance Max, as stated in its help pages, is to use negative keywords only for essential brand safety needs or to block clearly irrelevant terms, and to use brand exclusions to keep brand searches out. The reasoning is that the system decides where to show ads based on assets and signals. The article on Performance Max campaigns for small businesses explains how that works and when it is a poor fit. Check the current documentation, because options are updated.

In Search campaigns you have more control. The same discipline applies there: negatives are one part of a larger job that also includes writing relevant ads and matching them to the right page.

A simple routine to keep it healthy

1. Weekly for the first month, then monthly: review the search terms report.
2. Add clear mismatches as negatives and note why.
3. Check that conversions and volume did not drop afterwards.
4. Quarterly: review the full list for conflicts and outdated terms.
5. When you add a new service, review negatives that might block it.

Negatives work best alongside strong messages. If many people click and leave, the ad may promise something the page does not deliver. Customer feedback helps here. Using customer reviews in your ads and pages sets expectations clearly, and a testimonial video can show buyers what the service is really like, which reduces mismatched clicks. Keep your funnel in mind as well, since people at different stages search differently, as shown in the marketing funnel explained.

If you would like help auditing search terms and setting up a sensible exclusion process, the digital marketing service from Liftup Technologies covers paid search management.

Related guides

• Digital marketing
• Customer reviews how to ask and use them
• Lead generation for small business where to start
• Marketing funnel explained
• Performance Max Campaigns Explained for Small Firms
• Testimonial Video: How to Plan and Record One

Questions and answers

What are negative keywords?

They are words or phrases that stop your Google Ads ad from showing on searches that contain them. Adding free as a negative keyword, for instance, stops your ad appearing for searches including that word. They help remove irrelevant clicks.

How do I find negative keywords?

Use the search terms report to see the actual searches that triggered your ads. Pick out clearly wrong intents, look for repeated words, check they never appear in converting searches, and add them at the right level. Ask whoever handles enquiries too.

What is the risk of adding too many negative keywords?

You can block searches that would have brought customers, conflict with your own keywords, and cut volume so far that automated bidding has too little data. Add in small batches, record reasons and review the list regularly.

Do negative keywords match close variants?

According to Google's help pages, they do not automatically match misspellings, plurals or other variants. If you want to block variants, add them as separate negative keywords.

Should I use account-level negative keywords?

Only for terms you never want anywhere in the account, such as clear job-seeker terms for a business that does not hire through ads. For anything that may matter to one service but not another, use campaign or ad group level.

Can I use negative keywords in Performance Max?

Google's guidance says to use them sparingly, for brand safety or to block completely irrelevant terms, and to use brand exclusions for brand searches. Check the current documentation because the options change.