Where the money actually goes
Wasted spend sounds like a subtle problem. Bids a little too high, a slightly wrong audience. It is usually much blunter than that. You are paying for clicks from people who were never going to become customers, and you can often see it at a glance.
Say you are a plumber. You bid on plumbing terms. Google, doing exactly what it was asked, shows your ad to someone searching for plumber salaries, someone looking for a plumbing course, and someone looking for free advice on fixing a tap themselves. All three might click. All three cost you money. None of them was ever going to book a job.
A negative keyword is the mechanism for that. Google's wording is plain: they let you exclude search terms from your campaigns. The word "exclude" is doing the work. The ad never shows, so there is no impression, no click and no cost.
Almost nobody does this
WordStream analyzed 251,236 Google Ads Grader reports from 15,666 accounts between January and November 2025.
A quarter of businesses have never added one. Not a thin list, not a stale list: none at all. Those accounts convert at 4.6% a month. Accounts with at least one negative keyword convert at 13%.
I want to be careful about what that comparison proves. Accounts with negatives are probably better run in other ways too, so the gap is not purely the negatives. But the direction is not ambiguous, and the effort involved is fifteen minutes.
The four patterns worth excluding on day one
These come up in nearly every account, whatever the industry, and none of them needs performance data to predict.
Jobs and salaries. People researching what your industry pays. High volume, zero commercial intent, and they will click.
Training and courses. People who want to learn to do it rather than pay someone.
Free, cheap, DIY.Explicit signals that the searcher is not buying. If someone types "free" in front of your service, they have told you their budget.
Competitor names, sometimes.This one is a judgment call rather than an automatic exclusion. Bidding on a competitor's name can work. Doing it accidentally, without having decided to, usually does not.
Match types decide how much reaches you
Google names three. Exact match shows on searches with the same meaning or intent as your keyword and gives you the most steering. Phrase match shows on searches that include the meaning of your keyword. Broad match, in Google's own words, may show on searches that do not contain the direct meaning of your keywords at all.
Broad match is not a trap. It is a reach setting. It works well on a mature account with a well-built negative list, because the list catches what broad match drags in. On a new account with no negatives, broad match is an open tap.
Start narrower than feels comfortable. It is much easier to widen a campaign that is under-spending than to explain a month of spend on searches you never wanted.
Then the weekly habit
No amount of preparation catches everything, because people type things nobody predicts. The search terms report shows what actually triggered your ads, which is a different list from the keywords you chose.
Sort by cost, look for anything that spent and could not have converted, add it as a negative. Fifteen minutes a week. The full routine, including the monthly and quarterly items, is in the Google Ads audit checklist.
Why this reaches further than the wasted clicks
Google builds Quality Score from three things: expected click-through rate, how closely your ad matches the intent behind the search, and how useful your landing page is to the person who clicked.
Showing ads to people who were never going to click drags the first of those down. So irrelevant impressions do not just cost you the clicks you paid for, they make the clicks you do want more expensive. Excluding the wrong searches leaves a cleaner record behind, and that record is what Google prices you on.
Building it in rather than bolting it on
Everything above is doable by hand. The reason it usually is not done is ordering: negative keywords are the least interesting part of setting up a campaign, they arrive at the end of a long afternoon, and nothing breaks if you skip them. The bill arrives later and does not say what it was for.
AdPilot writes them at build time. It reads your website, works out what you sell, and produces the campaign with negative keywords alongside the ad copy, keywords, budgets and extensions. Campaigns land in your Google Ads account paused, so you can read the negative list and change it before anything spends.
Once campaigns are running, the Optimize page reads your live account and surfaces the search terms that are costing money without converting, so the weekly habit has somewhere to start. It recommends rather than editing your account on its own.
- ✓Negative keywords generated with the campaign, not after the spend
- ✓Campaigns arrive paused so you read the list before it costs anything
- ✓Wasted search terms surfaced from your live account data
- ✓Match types set per ad group rather than left on the default
Questions people actually ask
How do I create campaigns with negative keywords already built in?
What are the most commonly wasted searches?
Should I avoid broad match entirely?
Do negative keywords affect Quality Score?
How many negative keywords should a campaign have?
Citations (5)showhide
- 1Our Biggest Google Ads Performance Study Yet: What We FoundWordStream
- 2About negative keywordsGoogle Ads Help
- 3About the search terms reportGoogle Ads Help
- 4About keyword matching optionsGoogle Ads Help
- 5About Quality Score for Search campaignsGoogle Ads Help
