Negative keyword

How a negative keyword works

When you buy a search term you are not buying that exact string. Match types let the platform show your ad for searches it judges related, which is what makes an account reachable at all and also what lets it drift somewhere you never intended. A negative keyword is the counterweight: an exclusion applied before the auction, so a search containing that term does not trigger your ad at any bid. Four mechanics decide whether a list actually works.

• Negatives have match types too, and they behave differently from positive ones. A positive broad keyword is generous — it reaches synonyms and close variants. A negative is literal, and does not extend itself to plurals, misspellings or synonyms. Excluding one spelling of a word does not exclude the other, which is why real lists are longer and uglier than people expect.
• They apply at several levels. Account-wide, per campaign, and per ad group. The level you choose is a statement about scope: an account-level exclusion is a rule about your whole business, while an ad-group negative is usually there to stop two of your own ad groups competing for the same search.
• Shared lists exist, and are the maintainable form. A list attached to many campaigns is edited once. The same terms pasted into six campaigns will be updated in four of them, and the two you forget are where the money goes.
• A negative is not a bid change. It removes the search from your account entirely rather than making it cheaper, so it is the wrong instrument for a term that is merely expensive and the right one for a term that is not you.

What negative keywords are actually for

The usual framing is waste-trimming: block the searches that will never convert and stop paying for them. That is true and it is the smaller half. The more useful way to read a negative list is that it defines the audience. Two campaigns bidding on identical keywords with different negative lists reach different people, so the list is not housekeeping — it is targeting, written in the negative.

We run our own search campaigns, and the change that moved our results most was not a new keyword. It was adding a batch of negatives to our Brazilian campaigns to steer them away from e-commerce and agency-service searches and toward people building software. Those two audiences type overlapping words and want opposite things, and no bid adjustment separates them — the exclusion list does. That is the honest version of what negatives are for: not a saving, a decision about who the campaign is talking to.

The limit is worth knowing too, because pruning has an end. A keyword whose underlying search intent is wrong cannot be rescued by a list — we eventually switched off one of our highest-volume head terms rather than keep adding exclusions to it, because the searches were not variants of our question, they were a different question that happened to share our words. Negatives sharpen a term that is already close. They also depend on you having this control at all: campaign types that hand targeting to the platform offer much less of it, which is one of the trade-offs in should I use Performance Max for my startup. Where you do have it, a tighter match between query and page tends to show up in Quality Score as well as in spend.