Negative keywords: stop wasting Google Ads spend

Almost every Google Ads account is paying for clicks it should never receive. Someone searches for a free version of what you sell, or a job at a company like yours, or a how-to guide when you offer a done-for-you service. Your ad shows, they click, you pay, and nothing useful happens. Negative keywords are the tool that stops this, and most accounts are not using them nearly hard enough.

This guide covers what negative keywords are, how their match types differ from normal keywords, how to build a list from the search terms report, and where to apply negatives so they do the most good without quietly blocking searches you actually want.

What negative keywords are

A normal keyword tells Google which searches your ad can show against. A negative keyword does the opposite: it tells Google which searches should exclude your ad. If you sell premium accounting software and add "free" as a negative keyword, your ad will not show when someone searches for free accounting software.

The point is not to reduce the number of clicks for its own sake. It is to stop paying for clicks from people who were never going to become customers. Every irrelevant click you block is budget that stays available for the searches that matter. Over a month, on a busy account, that can be a large share of spend.

Negatives also improve the signals your account sends. When your ads stop showing for mismatched searches, your click-through rate and relevance improve on the queries that remain, which supports Quality Score and keeps your cost per click in check.

Negative match types are not the same as normal ones

Negative keywords use the same three match types as standard keywords - broad, phrase and exact - but they behave more conservatively, and the difference matters.

• Negative broad match (just type the words, no symbols) blocks searches that contain all of your terms in any order, but it does not expand to synonyms or close variants the way positive broad match does. "free trial" as a negative broad blocks searches containing both "free" and "trial".
• Negative phrase match ("free trial" in quotes) blocks searches that contain your exact phrase in order.
• Negative exact match ([free trial] in brackets) blocks only the exact search, nothing more.

A key catch: negative keywords do not match close variants, plurals or misspellings automatically. If you add "job" as a negative, "jobs" can still trigger your ad. Add the variants you care about, or use negative broad on the root word to catch the common forms.

Single-word negative broad terms are the workhorse. Adding "free" as a negative broad keyword blocks "free", "free trial", "free download" and so on in one stroke.

Mine the search terms report

The search terms report is where negative keywords come from. It shows the actual queries people typed before clicking your ad, which is different from the keywords you bid on, especially when you run phrase or broad match.

Work through it on a schedule. Newer or higher-spend accounts deserve a weekly pass; established ones can move to fortnightly or monthly.

1. Open the search terms report and sort by cost or impressions.
2. Read down the list and flag anything irrelevant to what you sell.
3. Decide the right scope for each: a one-off bad query can be an exact negative, while a recurring junk word is better as a broad negative.
4. Add the negatives, then check that you are not catching anything good in the same sweep.

This habit alone tends to recover more wasted spend than any single bid change. It is a core part of how we run accounts in our paid search service, and it is the first thing we look at when auditing a new account.

Account, campaign and ad-group level

You can apply negatives at three levels, and choosing the right one keeps your list manageable.

• Account level blocks a term everywhere. Use it for things that are never relevant to your business, such as "jobs", "careers" or an unrelated industry that shares a word with yours.
• Campaign level blocks a term within one campaign. Use it to separate intent, for example keeping "cheap" out of a premium campaign while allowing it in a budget-focused one.
• Ad-group level blocks a term within one ad group, often to stop two similar ad groups stealing each other's traffic.

A common and useful pattern is cross-negation between ad groups: if you have separate ad groups for "running shoes" and "trail running shoes", you might add "trail" as a negative in the plain running shoes group so each search lands in the most relevant place.

Build and reuse negative keyword lists

Negative keyword lists let you maintain a set of negatives once and apply it to many campaigns. This is far easier than copying the same exclusions into every campaign by hand.

Useful lists to maintain include:

• A general junk list - "free", "jobs", "cheap", "DIY", "how to", "what is", "salary".
• A competitor brand list, if you do not want to appear on competitor names.
• An industry-specific list of terms that look related but signal the wrong intent.

Build the list once, apply it across the relevant campaigns, and update it in one place as new themes appear. New campaigns can inherit your hard-won negatives from day one.

Common themes worth blocking

Across most accounts, the same irrelevant intents come up:

• Job seekers - "jobs", "careers", "salary", "vacancies".
• Bargain hunters - "free", "cheap", "discount", where they do not fit your offer.
• Do-it-yourself researchers - "how to", "DIY", "tutorial", "template", when you sell a service rather than instructions.
• Competitor brands - their names, unless you have a deliberate reason to bid on them.
• Wrong product or audience - words that share your keyword but mean something else entirely.

Block the intent, not just the word. A "how to" search and a "buy" search behave completely differently even when they share a noun.

The pitfall: over-blocking

The biggest risk with negatives is being too aggressive. Add a broad negative carelessly and you can shut off valid searches without realising it.

• A single-word broad negative like "service" might block far more than you intend.
• Conflicting negatives can stop a keyword from ever serving. Google will flag some of these, but not all.
• Negatives added during a panic over one bad query can quietly throttle a whole theme.

Before adding a broad negative, ask what else contains that word. When in doubt, start narrower with phrase or exact, watch the impact, then widen. Review your negative lists every so often, because a term that made sense last year may be blocking demand this year.

Make it routine

Negative keywords are not a one-time setup. They are a recurring discipline: read the search terms report, block what does not fit, and keep the budget pointed at people who might actually buy. Done consistently, it lowers wasted spend and lifts the relevance of everything that remains, which often does more for your results than chasing the next bidding strategy.

If you would like a review of where your budget is leaking, or specialists to run this for you, Control Tower manages Google Ads for businesses in Sydney and across Australia, and tightening the negative side of the account is usually one of the first wins we find.

---FAQ---

Q: What is the difference between a keyword and a negative keyword? A: A normal keyword tells Google which searches your ad can appear for. A negative keyword does the opposite and tells Google which searches should exclude your ad, so you stop paying for clicks from people who are unlikely to become customers.

Q: Do negative keywords match plurals and misspellings automatically? A: No. Unlike positive keywords, negative keywords do not match close variants such as plurals or common misspellings on their own. If you add "job" you may still show for "jobs", so add the variants you care about or use a negative broad match on the root word.

Q: Should I add negatives at the account, campaign or ad-group level? A: Use account level for terms that are never relevant anywhere, such as "jobs" or "careers". Use campaign level to separate intent between campaigns, and ad-group level to stop similar ad groups competing for the same searches.

Q: How often should I review the search terms report? A: Newer or high-spend accounts benefit from a weekly review, while established accounts can move to fortnightly or monthly. The aim is to catch irrelevant queries before they accumulate meaningful wasted spend.

Q: Can negative keywords hurt my campaign? A: Yes, if you over-block. An overly broad negative can shut off valid searches, and conflicting negatives can stop a keyword serving at all. Start narrow with phrase or exact match when unsure, then widen once you have checked the impact.