Google Ads search terms report with irrelevant searches highlighted and coins leaking out

Negative Keywords: The Silent Budget Leak in Your Google Ads Account

You bid on "personal injury lawyer."

Google showed your ad for "personal injury lawyer salary."

Someone clicked.

You paid.

They were never going to hire you.

It’s one of the most common leaks we find in Google Ads accounts.

Not because the keywords are wrong, but because nobody told Google what not to show up for.

What Negative Keywords Actually Do

Negative keywords stop your ads from showing on searches that contain certain words or phrases.

They’re the guardrails on your budget.

And they matter more every year, because Google’s matching keeps getting broader. Broad match, AI Max, and Performance Max all look for searches beyond your exact keywords.

The broader the matching, the more your negative keyword list is worth.

The 6 Most Common Wasted Search Types

1 Job Seekers

"Salary," "jobs," "careers," "hiring," "internship."

2 DIY and Free Seekers

"Free," "DIY," "how to," "template," "yourself."

3 Researchers and Students

"Definition," "what is," "examples," "course," "certification."

4 Wrong Location

City and state names you don’t serve.

5 Wrong Product or Service

Services you don’t offer that sound similar to ones you do.

6 Existing Customers

"Login," "support," "cancel," "phone number." People who already know you, costing you a click.

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How to Build Your List in One Afternoon

  1. Open the search terms report
    Go back at least 90 days. Sort by cost.
  2. Flag every term with spend and no conversions
    Ask: would this person ever buy from us?
  3. Look for patterns, not just terms
    One word like "free" can block hundreds of wasted searches.
  4. Build a shared negative list
    Apply it across every campaign, including Performance Max.
  5. Check your match types
    Make sure you’re not blocking searches that actually convert.
  6. Repeat weekly for a month, then monthly
    New junk searches show up all the time.

The Math That Matters

Where the Money Goes
Monthly Spend
$8,000
20% on Irrelevant Searches
$1,600 / Month
Recovered Per Year
$19,200

Illustrative example. That’s budget you can put back into searches that actually convert.

One Warning

Don’t overdo it.

Blocking too aggressively can choke off good traffic. A word that looks irrelevant sometimes converts.

Always check conversion data before you add a negative.

Where to Focus First

If you only have thirty minutes this week:

  • Sort search terms by cost for the last 30 days
  • Add negatives for the top ten wasted terms
  • Add the obvious universal words: jobs, salary, free, DIY

That alone can stop a meaningful share of waste before the month is over. Then build the full list when you have an afternoon.

Final Thought

Negative keywords aren’t exciting.

They don’t show up in a pitch deck.

But they’re one of the fastest ways to cut waste in any Google Ads account. Every dollar you stop spending on the wrong search is a dollar that can go to the right one.

Sources & References
support.google.com — About Negative Keywords support.google.com — About the Search Terms Report optmyzr.com — Performance Max Campaign Level Negatives
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