You’re Wasting Money in Google Ads if You’re Not Using Negative Keywords
If you’re running Google Ads and not using negative keywords properly, you’re almost certainly wasting money. And in most accounts, it’s not a small amount. Negative keywords are the single fastest way to stop budget leaks, tighten up your targeting, and make Google focus on the customers you actually want.
Yet most advertisers ignore them entirely.
This guide walks you through why negative keywords matter, how to find them, and the exact process to add them inside Google Ads.
Why Negative Keywords Matter More Than Ever
Here’s the reality most people don’t realise.
Google gets paid every time someone clicks your ad.
You only get paid when the right person clicks your ad.
Those incentives are not the same.
Google will always lean towards more impressions and more clicks because that’s how they make revenue. Without negative keywords, you give Google far too much freedom to show your ads for irrelevant, low-intent, or just plain wrong search terms.
This is why so many businesses overspend without even realising it.
Where Budget Leaks Happen: The Search Terms Report
Inside your Google Ads account, go to:
Insights and Reports → Search Terms
This is where you see the exact searches that triggered your ads.
If you’ve never looked at this report before, you’ll likely find:
- People looking for free versions
- Job seekers
- DIY queries instead of paid services
- Competitor names
- Low intent searches like “how to…”
- Completely unrelated industries
These terms are dangerous because they look small in isolation, but over a month they quietly drain your budget.
One irrelevant search at £2 a click
Suddenly becomes £200 a month
Which becomes £2,400 a year
On people who were never going to buy from you.
How to Add Negative Keywords in Google Ads
Adding negative keywords is the quickest and easiest win in PPC. Here’s the simplest approach.
Step 1: Open your Search Terms Report
Go to Insights and Reports → Search Terms.
Step 2: Look for anything irrelevant or unprofitable
Ask yourself:
- “Would this person ever buy from us?”
- “Does this search show buying intent?”
- “Has this term spent money with no conversions?”
If the answer is no, it’s a negative keyword.
Step 3: Tick the terms and click Add as Negative Keyword
Google lets you apply negatives at:
- Ad group level
- Campaign level
- Account or shared list level
Use campaign or account-level negatives for anything completely irrelevant to the business.
Use ad group-level negatives to keep similar products or services separated.
Step 4: Repeat this weekly
High-spend accounts should check search terms daily. Lower spend can get away with weekly checks.
This regular clean-up keeps your campaign sharp and prevents Google from drifting too far from your actual audience.
Why Negative Keywords Make Your Ads More Profitable
When your negative keyword list is strong, you’ll notice immediate improvements:
Better traffic quality
You’re only paying for people who are actually looking for what you sell.
Lower cost per conversion
Cutting wasted clicks means more budget goes to the right audience.
Higher conversion rates
Removing irrelevant searches means more qualified users reach your landing page.
Better machine learning signals
Google’s automated bidding works far better when fed clean, high-quality data.
More control over your account
Too many advertisers rely purely on Google’s automation. Negatives give you back control.
Common Negative Keywords Most Businesses Miss
Across hundreds of accounts, here are the terms we see wasting money again and again:
- free
- jobs or careers
- cheap
- DIY
- second hand
- how to / what is
- competitor brand names
- student / training / courses
- near me (when irrelevant)
- unrelated industries that share similar wording
If you spot these in your search terms report, add them immediately.
Final Word: Google Wants Clicks, You Want Sales
You can’t rely on Google to filter traffic for you.
You can’t assume Google knows your ideal customer better than you do.
And you definitely can’t trust Google to spend your budget perfectly without guardrails.
That’s what negative keywords are: guardrails.
They stop irrelevant traffic.
They keep your targeting tight.
They make every pound work harder.
If you care about profitable ad spend, negative keywords are not optional. They’re essential.