The average Google Ads account wastes 30–50% of its budget on searches that will never convert. The culprit? Missing negative keywords. This is the single most impactful fix you can make, and it takes less than a day to implement.
What is a negative keyword and why does it matter?
A negative keyword tells Google “don’t show my ad for this search.” Without a robust negative keyword list, your plumbing ad appears when someone searches for “plumbing jobs near me” or “plumbing courses” — both of which have zero chance of converting into a paying customer. You pay for the click anyway.
The 4 categories of wasted spend you need to identify
1. Informational searches (no buying intent)
Searches like “how does X work,” “what is X,” and “X explained” suggest someone is researching, not buying. These clicks are expensive and almost never convert. Add “how,” “what,” “why,” “tutorial,” and “explained” as broad match negatives.
2. Job-seeker searches
If you run a service business and your keyword is broad, Google will frequently show your ad to people searching for jobs in your industry. Add “jobs,” “salary,” “careers,” “vacancy,” and “hiring” to your negative list immediately.
3. Competitor brand searches
Unless you have a specific competitor targeting strategy, you don’t want to pay for clicks from people looking for a specific competitor by name. The intent is brand loyalty, not comparison — your conversion rate will be near zero.
4. Free / DIY searches
“Free,” “cheap,” “DIY,” “how to do myself” — these indicate price sensitivity that rarely converts into a paying client. Unless you offer a free tier, add these as negatives.
How to build your negative keyword list
- Download your Search Terms report for the last 90 days
- Highlight every term that has cost but no conversions
- Group them into themes (informational, job-seekers, DIY, wrong location, wrong service)
- Add these as exact or phrase match negatives at campaign level
- Create a shared negative keyword list and apply it across all campaigns
- Review Search Terms monthly and add new negatives as you find them
What happens after you add negative keywords
In the short term, your impressions and clicks will drop. This is exactly what you want. Your budget is now only spending on relevant searches. CPL typically drops by 20–40% within the first 30 days. In some accounts we’ve audited, removing irrelevant traffic has cut CPL in half.
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