Negative Keywords: The Easiest Way to Stop Wasting Ad Spend

Every search campaign pays for some clicks it should never have received. Someone looking for a job, a free template or a completely different product sees your ad, clicks it and leaves. Each of those clicks costs money and teaches nothing useful.

Negative keywords are the simplest fix. They tell Google which searches you do not want your ads to appear for. They take minutes to add, cost nothing and are one of the first things worth checking in any account.

Why irrelevant searches happen

Google matches your keywords to searches that it considers related in meaning, not only to exact wording. Broad match in particular can reach a very wide range of searches. That flexibility helps you find people you would not have thought to target, but it also means your ads can show for searches that look similar on the surface and mean something quite different.

A company selling commercial cleaning services, for example, might find its ads appearing for “cleaning jobs near me”, “how to clean an oven” or “cleaning products wholesale”. None of those people want to hire a cleaning company.

Where to find negative keywords

The best source is your own data. The search terms report shows the actual searches that triggered your ads. Review it regularly and look for:

• Job seekers: jobs, careers, vacancies, salary, apprenticeship.
• Do it yourself intent: how to, DIY, tutorial, guide, template.
• Bargain hunters you cannot serve: free, cheap, second hand, if you do not compete on price.
• Wrong products or services: things that share a word with what you sell but are not what you offer.
• Wrong locations: place names you do not cover.
• Competitor names, if you have decided not to bid on them.

Before you launch a new campaign, you can also brainstorm likely problem terms. Think about the other meanings of your main keywords and the reasons someone might search for them without wanting to buy.

Understand negative match types

Negative keywords use match types too, but they behave differently from normal keywords. The most important difference is that negative keywords do not automatically cover close variants such as plurals, misspellings or synonyms. If you want to block both “job” and “jobs”, add both.

• Negative broad match blocks searches that contain all of the negative words in any order. Adding free template blocks “free cv template” but not “cv template”.
• Negative phrase match blocks searches that contain the words in that exact order. Adding “oven cleaning” blocks “oven cleaning tips” but not “cleaning an oven”.
• Negative exact match blocks only that exact search. It is useful when a precise query is wasteful but related queries are valuable.

Single words added as negative broad match are the bluntest tool. They are ideal for words like “jobs” that are never relevant, but be careful with words that can appear in good searches as well as bad ones.

Choose the right level

You can add negatives at different levels, and the choice matters:

• Ad group level is useful for steering traffic. If one ad group covers “emergency plumber” and another covers “plumber”, adding “emergency” as a negative in the general group helps the right ad show for the right search.
• Campaign level blocks a term across the whole campaign.
• Shared negative keyword lists let you build one list, such as “Jobs and careers”, and apply it to many campaigns at once. This is the easiest way to keep things consistent as an account grows.

Avoid blocking good traffic

The main risk with negative keywords is being too aggressive. A single careless negative can quietly stop ads showing for searches that would have made money. A few habits help:

• Check a new negative against your keyword list before you add it, to make sure it does not block your own keywords.
• Look at conversion data before you exclude a term. Something that looks irrelevant may have produced sales.
• Be wary of blocking words like “near me”, “best” or “price”, which often signal buying intent.
• Keep a note of what you added and why, so anyone can review the decision later.

Google Ads may warn you when a negative conflicts with an active keyword. Take those warnings seriously.

How often to review

For a new campaign, look at the search terms report every few days for the first few weeks, because that is when most of the obvious waste shows up. Once a campaign is settled, a weekly or fortnightly review is usually enough for smaller accounts. Larger accounts with broad match keywords and big budgets may need more frequent checks.

Keep in mind that the search terms report does not always show every query, particularly low-volume ones. Regular reviews still catch the patterns that cost the most.

A simple starting routine

1. Create a shared list of terms that are never relevant to your business and apply it to all search campaigns.
2. Open the search terms report for the last 30 days and sort by cost.
3. Mark any term with spend and no conversions that clearly does not match what you sell.
4. Add each one at the right level and match type.
5. Repeat on a regular schedule and log your changes.

Key takeaways

• Negative keywords stop ads showing for searches that will never convert.
• The search terms report is the best source of new negatives.
• Negative match types do not cover close variants, so add plurals and variations yourself.
• Use shared lists for consistency and ad group negatives for steering traffic.
• Check before you block, so you do not lose valuable searches.

If you suspect your campaigns are paying for the wrong searches, SEO Fleet’s PPC audit reviews your search terms and negative keyword setup and gives you a clear list of changes to make.