What is Negative Keywords?
Terms you exclude from a Google Ads campaign so your ads never appear against them.
A worked example
A premium dental clinic bidding on "dental implants" appears for "dental implants government hospital", "free dental camp" and "dental implant course fees". Adding those as negatives stops the spend immediately, and none of that traffic was ever going to book.
Why it matters
Negative keywords are the cheapest performance improvement available in most Google Ads accounts, and the most neglected. Broad and phrase match will always pull in adjacent searches, some useful and some absurd, and the only way to find out which is to read the search terms report.
The waste tends to cluster in predictable places. Job seekers searching your service plus "vacancy" or "salary". Students searching "course" or "training". People looking for free or government alternatives. Competitor brand names you never intended to bid on. DIY searchers looking for "how to" when you sell the service.
For accounts that have never done this systematically, the first pass often removes a noticeable share of spend without touching a single bid. That reclaimed budget goes back into terms that convert, which is why this is usually the first thing we do rather than the last.
The nuance most people miss
Negative keyword match types work in the opposite direction to positive ones, and getting this backwards causes real damage. A broad match negative blocks any search containing all those words in any order, which can silently suppress terms you wanted. Adding "free" as a broad negative also blocks "freelance dental hygienist near me". Use phrase and exact negatives for anything ambiguous, and check the impression drop after a large negative list goes live.
Common mistakes
- Building the list once at launch and never reading the search terms report again
- Using broad match negatives carelessly and blocking valuable traffic without noticing
- Adding negatives at campaign level when the term should only be excluded from one ad group
- Excluding competitor names by reflex, when competitor bidding is sometimes worth testing deliberately