Negative keywords guide: the cheapest fix in any ad account

Aug 22
3 min read

Updated: 2 days ago

Introduction

Most small ad accounts do not have a targeting problem. They have a filtering problem.

The ads reach people the business could never serve or would never want, and the budget is spent before the right searches ever appear. Negative keywords are the correction, and they are free.

1. A negative keywords guide starts with the search terms report

Everything useful comes from one place: the list of actual searches that triggered your ads.

Not the keywords you chose — the queries people typed. In most accounts that has never been opened, and the first read is uncomfortable. Job seekers, students, competitors, people in other countries, people looking for something adjacent and free.

Open it, sort by cost, and read the top fifty. That single hour usually identifies a fifth of the budget doing nothing.

2. Add the standard exclusions before launch

Some categories waste money in almost every account and can be excluded on day one.

Price-resistant: free, cheap, cheapest, discount, coupon, bargain.

Self-service: DIY, how to make, tutorial, template, guide, course.

Non-buyers: jobs, salary, career, vacancy, internship, wholesale if you are retail.

Research: meaning, definition, wikipedia, reddit, examples, statistics.

None of these guarantee a bad fit, but for a small budget the odds are poor enough that excluding them first and reviewing later is the right default.

3. Understand what each match type blocks

Negatives behave differently from ordinary keywords, and this catches people out.

Broad negative blocks any search containing all those words in any order. Phrase negative blocks searches containing that exact sequence. Exact negative blocks only that precise query.

Also important: negatives do not automatically cover plurals, misspellings or variants the way positive keywords do. If you exclude "job" you have not excluded "jobs". Add both.

4. Exclude the adjacent business you do not run

The most costly waste is usually a near-miss rather than an absurd one.

A caterer paying for wedding venue searches. A repair shop paying for spare parts searches. A training provider paying for accredited qualification searches when the courses are not accredited.

These look relevant, so they survive every review. List what you explicitly do not offer and exclude it deliberately.

5. Use lists, not per-campaign entries

Keep negatives in shared lists applied at account level so a new campaign inherits the protection.

One list for permanent exclusions, one per campaign for terms that are wrong there and fine elsewhere. A term like "free" might be a hard exclusion for a service business and legitimate for a business advertising a free trial.

Entering negatives campaign by campaign guarantees the newest campaign is the least protected, which is also the one you are watching least.

6. Stop your own campaigns competing

An underrated use: keeping the right campaign matched to the right search.

If you run separate campaigns for different services, add each service's terms as negatives in the others. Otherwise a broad keyword in one campaign captures searches meant for a page that would have converted better.

The symptom is one campaign quietly absorbing budget and converting worse than its structure suggests.

7. Review monthly, and only on cost

Make it a recurring slot: sort search terms by spend, read the top of the list, exclude what does not belong.

Cost order matters. A ridiculous query that cost nothing is not worth attention; a plausible query that cost a meaningful share of the month is. Reviewing alphabetically or by impressions finds the amusing waste and misses the expensive kind.

Fifteen minutes a month is enough once the initial pass is done.

8. Know when you have gone too far

Over-exclusion is a real failure mode, and quieter than over-spending.

If impressions collapse after a negatives pass, check whether a broad negative is blocking legitimate searches — a single word excluded broadly can remove far more than intended.

Add negatives in small batches and watch volume for a week. And keep a note of why each exclusion exists, so a future review does not reinstate waste or remove protection nobody remembers the reason for.

Conclusion

Read the search terms report first, add the standard price, self-service, non-buyer and research exclusions before launch, and remember that negatives do not cover variants automatically.

Exclude the adjacent services you do not offer, manage everything through account-level lists, prevent your own campaigns overlapping, review monthly in cost order, and add in small batches so over-exclusion is visible.