Step-by-Step Guide: How to Use Negative Keywords for Better Ad Targeting

In the world of paid advertising, negative keywords are one of the most powerful yet often overlooked tools in your Google Ads toolkit. When used correctly, they refine your targeting, cut wasted spend, and help you connect with audiences who truly matter, rather than those who accidentally click your ads.

But what exactly are they, why should you care, and how do you use them in real campaigns? Let’s dive into a comprehensive yet practical guide on how to use negative keywords to optimise your ads and maximise ROI.

What Are Negative Keywords?

Negative keywords are terms or phrases you explicitly exclude from your Google Ads campaigns so that your ads don’t show for search queries that contain them. In essence, they act as a filter ensuring your ads are shown only to the most relevant audiences and exclude searches that don’t match your business goals.

For example, if you sell high-end software, you might not want your ad to show when someone searches for “free software options.” Adding “free” as a negative keyword ensures your ad won’t appear for that query, saving you clicks that are unlikely to convert.

Why Negative Keywords Matter in PPC

Adding negative keywords is not just a nice-to-have, it’s essential for any effective PPC strategy. Here’s why:

1. Cut Wasted Spend

Without negative keywords, your ads could appear for searches that are completely irrelevant to your business, resulting in wasted budget.

2. Improve Relevance

By excluding unrelated search terms, you help Google show your ads to audiences who are more likely to convert — boosting your campaigns’ relevance.

3. Boost Click-Through Rate (CTR)

Since your ads now show for more qualified searches, your CTR often improves because more of the impressions are meaningful.

4. Better Quality Score

A higher CTR and more relevant matching search intent can improve your Quality Score, which in turn can reduce your cost per click (CPC) and improve ad rankings.

Types of Negative Keywords

To truly master negative keywords, you should understand the main match types:

Negative Broad Match

This default type excludes ads from searches containing all the terms in your negative keyword, regardless of the order.

Negative Phrase Match

Ads won’t show if the query contains your negative keyword in the same order. This gives you more control than a broad match.

Negative Exact Match

This is most restrictive, ads don’t show only if the search exactly matches your negative keyword.

How to Use Negative Keywords in Google Ads

Now that you know what negative keywords are and why they’re important, here’s how to use them step-by-step:

1. Review Your Search Terms Report

Start by analysing real user search data from your campaigns. Google Ads’ Search Terms Report shows actual queries that triggered your ads. From this list, identify any searches that are irrelevant to your offer — these become great candidates for negative keywords.

This should be done regularly, weekly or bi-weekly, to catch unwanted queries early and keep your campaigns tight.

2. List Irrelevant Search Queries

Once you spot irrelevant terms like “free,” “cheap,” “tutorial,” or similar phrases that indicate wrong user intent, add them to your negative keywords list.

Grouping them logically (e.g., by products, services, or campaign goals) will help you manage them more efficiently.

3. Apply at the Right Level

Negative keywords can be applied at:

• Campaign level – excludes terms across the entire campaign.
• Ad Group level – excludes terms only in specific ad groups.

Choosing the right level ensures you don’t accidentally block relevant searches for other products or services.

4. Add Them to Your Account

In Google Ads, navigate to Campaigns → Keywords → Negative Keywords, and then click the plus (+) button to add them. You can also use Negative Keywords Lists to apply the same exclusions across multiple campaigns at once.

5. Organise & Update Regularly

Negative keywords are not a set-and-forget tactic. Make it a regular part of your optimisation process by reviewing and updating your list as your campaigns evolve. New trends and search terms can appear over time. 

Best Practices for Negative Keyword Management

Here are proven practices to use negative keywords more effectively:

Align With User Intent

Consider the intent behind each search term. If it doesn’t match your conversion goals, it’s a good candidate for exclusion. 

Avoid Over-Excluding

Too many negative keywords can shrink your reach and prevent your ads from showing to potentially valuable audiences. Find balance.

Use Match Types Strategically

Choose match types based on how strictly you want to filter out unwanted traffic — broad for general exclusions, exact for precise control.

Keep Lists Organised

Use shared lists for common negative terms like industry-wide exclusions, and tailor others to specific campaigns.

How This Enhances PPC Efficiency

By removing irrelevant terms from triggering your ads, you ensure your campaigns:

• Deliver to the right audience
• Have better engagement
• Spend budget more efficiently
• Win higher conversions

This careful refinement makes your PPC campaigns smarter and more cost-effective, especially when running competitive search ads.

Conclusion

Understanding how to use negative keywords is fundamental for any PPC marketer looking to sharpen their campaign performance. When applied properly, negative keywords help you focus your budget on audiences who matter most, reduce wasteful clicks, and ultimately drive better ROI.

Whether you’re managing your first Google Ads campaign or optimising existing ones, integrating negative keyword management into your workflow will pay dividends in efficiency and performance.

Want to take your Google Ads performance to the next level? Check out our advanced guides on SEM strategy and ad optimisation on DMB.sg to unlock even more actionable insights!