Negative keywords in Google Ads stop your ads from showing on searches that will never convert. Blocking those irrelevant searches cuts wasted ad spend and lifts your conversion rate. Every click you avoid leaves more budget for people who are ready to buy.

Many accounts lose money on searches containing words like ‘free’, ‘jobs’ and ‘DIY’, and the waste often goes unseen until the monthly report arrives. At Wowelle, we see the same leaks in paid search accounts across almost every industry.

This guide explains the three negative keyword match types, the Search Terms Report and the habits that keep your exclusions working. It also shows where each exclusion belongs in your account.

Google Ads Negative Keywords: Why They Are So Important

A negative keyword earns its place by blocking the irrelevant traffic that drains your budget. Google often matches your keywords more broadly than advertisers expect, especially on broad match. For example, a shoe shop bidding on ‘running shoes’ can pay for search queries like ‘free running shoes’ or ‘running shoe repair jobs’. Each of those clicks costs as much as a buyer’s click but brings back nothing.

Wasted spending hurts your account in two ways. First, it uses up the daily budget early, so your ads stop showing before real buyers search. Second, those empty clicks drag your conversion rate down.

Once you add negative keywords, Google Ads stops serving ads on those searches, and the money left over moves towards buyers. In our experience managing ad accounts, a clean exclusion list improves the click-through rate first (the change often shows within a week or two).

Relevance plays a part in the ad auction too, because Google rewards ads that closely match what people typed. Tighter Google Ads targeting can lift your expected click-through rate, which is one part of the quality score.

A higher quality score can then lower your cost per click over time. The benefits of using negative keywords also show in your return on ad spend, because fewer wasted clicks free up budget for searches that convert.

Which Negative Match Types Block Which Searches?

It is easy to pick a match type without checking what it blocks, yet the three types of negative keywords behave differently. Pick the wrong one and you will either block searches you wanted or let wasted clicks through.

The table below tests each type, using the negative keyword ‘cheap running shoes’, against one search query: ‘cheap running shoes near me’.

Negative match type	What it blocks	Blocks that search?
Negative broad match	All your words, in any order	Yes
Negative phrase match	Your words in the same order	Yes
Negative exact match	Only that search, word for word, nothing added.	No

Use negative broad matches for the obvious rubbish, such as ‘free’ or ‘jobs’. Save negative exact matches for one wasteful search when similar searches still convert. Negative keywords also ignore close variants, so add plurals and misspellings separately.

Google’s own guidance on negative keyword match types explains each one in more detail. Start with phrase match negatives, then widen or tighten them as your search terms data grows.

How to Find Negative Keywords That Sharpen Google Ads Targeting

With the match types sorted, the next step is picking the exact terms you want to exclude. Finding the right negative keywords takes less effort than people assume, because every tool you need already sits inside Google Ads.

Work through the three areas below in order, and you will build a negative keyword strategy that improves with every review.

Using the Search Terms Report to Spot Irrelevant Clicks

The Search Terms Report shows the real search queries behind your clicks, so you can see exactly where budget leaks occur. Google hides some low-volume search terms for privacy reasons, which means the report will not list every click.

Open the report, set the date range to the last 30 days and sort by cost. Tick every term that could never become a sale, then click ‘Add as negative keyword’ to block it.

Patterns appear quickly because job seekers, students and bargain hunters tend to arrive through the same irrelevant terms each month. Those repeat offenders become your list of common negative keywords.

Adding Campaign-Level Negative Keywords and Ad Group Exclusions

To add them, open a campaign, go to Audiences, keywords and content, then select Search keywords and the Negative search keywords tab. From there, choose whether each exclusion applies to the campaign or a single ad group.

Terms that are wrong for one campaign belong in campaign-level negative keywords. For example, ‘cheap’ might suit a budget range but waste money on a premium campaign. Terms that are wrong everywhere, such as ‘jobs’ or ‘free’, belong in account-level negative keywords instead.

Ad group-level negative keywords do the finer work. We often use them to stop two ad groups from competing for the same search, so each query reaches the most relevant ad.

When a Shared Negative Keyword List Speeds Up PPC Optimisation

Shared negative keyword lists save time once you run two or more campaigns. You update the exclusions in one place, and every linked campaign follows the change.

To build one, go to Tools, open the Shared library and select Exclusion lists. Create a new negative keyword list, give it a clear name and apply it to the campaigns that need it. The first setup takes about five minutes.

Keep a separate list for each theme, such as competitors, jobs or price terms. That way, you can remove one list from a campaign without touching the others. Regular list upkeep often does more for PPC optimisation than another round of bid tweaks

Habits for Managing Negative Keywords in Paid Search

Once your negative keywords are in place, a few regular checks will keep them effective and your budget focused. Clean accounts usually come from a steady routine, because a longer list alone will not stop new waste.

Here are three habits worth building into your monthly workflow before you try anything more advanced. Review:

• Review Search Terms Monthly: A monthly check catches new irrelevant terms before they drain another month of budget. Sort by cost so the most expensive waste appears first. For high-spend accounts, a fortnightly check will catch problems sooner.
• Avoid Blocking Too Much: Choosing negative keywords too broadly can cut valuable traffic along with the waste. Broad match negative keywords such as ‘cheap’ may block buyers who still convert well. Test each term against the searches you want before you add it.
• Sort Negatives by Intent: Group your exclusions into buckets like price, jobs and DIY so the list stays readable. Clear names make each monthly review faster. They also show at a glance which list blocks which type of search.

Treat your negative keyword list as a living document that changes with your campaigns. Each review keeps more of your budget pointed at searches that convert.

Give Your Exclusion List Ten Minutes This Week

Negative keywords give you control over who sees your ads, and which searches never cost you a cent. That control improves each month you keep the list current, because every review removes another source of waste.

Open your account this week and spend ten minutes on your exclusions before the next billing cycle starts. Accounts that keep this routine tend to grow steadily, while neglected ones continue paying for irrelevant clicks. waste.