Negative Keywords: A 90 Day Cycle for Google Ads Campaign Managers

Negative keywords stop your ads from showing for specific searches that have nothing to do with what you sell, and they’re the fastest lever you can pull to cut wasted spend. If you haven’t checked yours this month, open the search terms report right now, scan for obviously irrelevant queries and add them as negatives before another dollar leaks out.

TL;DR:

• On Search, broad negatives block queries containing every listed term in any order, while phrase and exact match offer tighter control; plurals require separate entries.
• Review a new campaign’s search terms report weekly during its first month, sorting by cost or clicks, then switch to fortnightly checks.
• Performance Max and Shopping rely on account level lists for exclusions, while Display and Video treat every negative as broad match.
• Google Ads allows up to 20 shared negative keyword lists per account, each holding 5,000 terms; account level lists have a 1,000 keyword limit.
• Before a large batch, check negatives against active positive keywords, then monitor impression share and conversions for a week or two to catch excessive blocking.

Table of Contents

• How negative keyword match types work and what each blocks
• How to find high-value negative keywords from the search terms report and tools
• Step-by-step: add, edit and manage negative keywords and shared lists
• Account limits and how negatives behave across Search, Display, Video and Performance Max
• Routine hygiene and best practices to make negative keywords sustainable
• Common errors PPC managers make with negative keywords
• How a practitioner runs negative-keyword hygiene inside campaign management
• Examples of negative keywords for service businesses
• Negative keywords are ongoing hygiene, not a one-off
• How we help with negative-keyword audits and ongoing management
• FAQ
• Sources

How negative keyword match types work and what each blocks

Negative keywords come in three match types for Search campaigns, and picking the wrong one is the single most common reason advertisers either block too much or too little, according to Google Ads Help.

Each type controls how tightly the exclusion applies:

• Negative broad match blocks a search when it contains all your negative terms, in any order, so it’s the widest net and best for clearly unwanted themes.
• Negative phrase match blocks a search when your exact phrase appears in that order, even with other words around it, giving you phrase-level control.
• Negative exact match blocks only that precise phrase with nothing added, which makes it the right tool for surgical exclusions.
• Close variants aren’t matched automatically. Unlike positive keywords, negatives won’t catch plurals, misspellings or related forms on their own, so you need to add “repair” and “repairs” separately, for instance.
• Symbols rarely matter, but the order of words inside a negative phrase or exact entry does, since that order is exactly what Google checks against the query.

That close-variant gap catches a lot of accounts out. Google Ads Help confirms negatives are case-insensitive and tolerate minor misspellings, but they won’t stretch to cover a plural or a stemmed version of the same word unless you type it in yourself. Add “jobs” as well as “job,” or “courses” as well as “course,” whenever you exclude a theme rather than a single term.

How to find high-value negative keywords from the search terms report and tools

The search terms report is the best place to find negatives because it shows you exactly what people typed before your ad appeared, according to Google Ads Help. Work through it on a schedule rather than waiting for a budget blowout to prompt you.

1. Open the search terms report and sort by cost or clicks to surface the queries draining budget first.
2. Check the match type column to see whether a wasted click came from a broad match expansion or a genuinely close variant.
3. Scan for intent mismatches: job seekers, DIY researchers, free-tool hunters and competitor brand searches are the usual culprits.
4. Group recurring patterns (a city you don’t service, a product line you’ve dropped, a review you keep getting flagged for) so one negative blocks many near-identical queries at once.
5. Decide where the exclusion belongs: a single ad group for a narrow issue, the whole campaign for something broader, or a shared list when it applies everywhere.

Keyword planning tools and query filters help you spot patterns faster, and some teams use regex-style filters in their reporting to cluster similar irrelevant terms before adding them in bulk. A tradie running Search ads might exclude “how to,” “DIY,” “course” and “jobs,” while a clinic might exclude “free,” “volunteer” and specific conditions it doesn’t treat.

Pro Tip: Run the search terms report weekly for the first month on a new campaign, then shift to fortnightly once the obvious noise is cleared.

Step-by-step: add, edit and manage negative keywords and shared lists

Adding negatives correctly the first time saves you from re-auditing the same mistakes later. Google Ads Help sets out the paths for ad group, campaign and account-level exclusions.

1. From the search terms report, tick the box next to an irrelevant query and choose “Add as negative keyword,” selecting the ad group, campaign or list it should apply to.
2. To add manually, go to Keywords, then Negative keywords, then the plus button, and choose the match type before saving.
3. For account-wide exclusions, build a negative keyword list under Shared Library and apply it to every relevant campaign in one step.
4. Export your current negative lists before a bulk edit, make changes in a spreadsheet, then re-import to avoid manual entry errors.

Before saving any batch of negatives, run a few checks:

• Search the list for overlap with your active positive keywords, since a negative can silently block a keyword you’re paying to target.
• Set a short monitoring window (a week is usually enough) after a large batch to confirm impressions haven’t dropped on terms you actually want.
• Keep shared lists named by theme or funnel stage so another team member can understand the logic without asking you.

Shared negative lists are worth setting up early. Grouping exclusions by theme, such as “job seekers,” “free tools” or “out of service area,” means a new campaign inherits the hygiene work you’ve already done instead of starting from zero.

Account limits and how negatives behave across Search, Display, Video and Performance Max

Negative keywords aren’t unlimited, and the caps change how you structure them at scale. Account-level negative keyword lists carry a 1,000-keyword limit, according to Google Ads Help, and apply across Search and Shopping inventory including Performance Max.

At the broader account level, Google Ads Help documents further caps: up to 20 shared negative lists per account, each holding as many as 5,000 keywords, alongside per-campaign limits that vary by network. Large accounts need to plan their list structure around these ceilings rather than discovering them mid-audit.

Network behaviour also shifts what a negative actually does. On Display and Video campaigns, every negative keyword is treated as broad match regardless of how you entered it, so precision drops compared with Search, per Google Ads Help. That means a phrase or exact negative you’d trust on Search can behave more loosely on Display, and you may need placement or topic exclusions alongside it. Performance Max and Shopping rely on account-level lists rather than campaign-level negatives for much of their inventory, so getting that list right matters more than usual. Keep an eye on long-tail queries too: very long searches and close variants can slip past an exclusion that looks airtight on paper, which is exactly why the close-variant rule from earlier is worth re-checking whenever you expand a list.

Routine hygiene and best practices to make negative keywords sustainable

Negative keywords work best as a standing routine, not a one-time cleanup. Set a cadence that matches your spend: weekly checks for high-volume accounts, fortnightly for moderate budgets, monthly for smaller campaigns that generate fewer new queries.

• Review the search terms report on your chosen schedule and add anything clearly irrelevant before it accumulates cost.
• Organise shared lists by theme or funnel stage (competitor brands, job seekers, free-tool hunters) so they’re easy to reuse across new campaigns.
• Treat negatives as part of your Smart Bidding setup: cleaner query data helps automated bidding strategies focus on traffic that actually converts, since the algorithm learns from fewer irrelevant clicks.
• After any large batch of new negatives, track impression share and conversion volume for a week or two to catch over-blocking early.

Pro Tip: Tag each negative keyword list with the date it was last reviewed, so nobody wastes time re-auditing a list that’s already clean.

Hygiene compounds. An account audited every fortnight for three months accumulates a far cleaner query history than one touched once a quarter, and that history is exactly what Smart Bidding uses to decide who sees your ads next.

Common errors PPC managers make with negative keywords

Most negative keyword problems trace back to a handful of repeatable mistakes rather than anything exotic.

• Forgetting close variants: adding “plumber” but not “plumbers” leaves an obvious gap, since negatives don’t expand the way positive keywords do.
• Overlapping with active positive keywords: a broad negative can silently cancel out a keyword you’re bidding on, so cross-check new negatives against your live keyword list before saving.
• Leaning too hard on broad match negatives: broad negatives are powerful but blunt, and stacking too many account-level broad exclusions too quickly can cut off traffic you didn’t mean to lose.
• Skipping the follow-up check: adding negatives without watching impression share and conversions afterwards means you might not notice over-blocking until a slow month forces the question.

How a practitioner runs negative-keyword hygiene inside campaign management

An audit-first approach usually starts with the obvious wins: pulling the highest-cost irrelevant queries from the search terms report and excluding them within the first week, before any shared-list architecture gets built. From there, grouping those exclusions into themed shared lists makes the next audit faster rather than starting from scratch each time.

A 90-day focus works well because it’s long enough to see real movement in lead cost and conversion rate without reacting to short-term noise. Teams typically keep day-to-day search term reviews in-house once the system is running, while the initial account restructure, shared-list build and bidding strategy adjustments tend to be where outside management earns its keep.

Examples of negative keywords for service businesses

Service businesses tend to waste budget on a predictable set of search terms, and the fix is usually the same handful of exclusions applied early.

A tradie or home services business commonly needs to exclude “jobs,” “careers,” “apprenticeship,” “DIY,” “how to fix” and “course,” since these searches come from job seekers and DIYers rather than paying customers. A mechanic or auto shop benefits from excluding “parts,” “manual,” “wiring diagram” and “second hand,” which tend to come from people sourcing components rather than booking a service. A clinic or professional services firm often needs “free,” “volunteer,” “intern” and the names of conditions or services it doesn’t offer, since a mismatch there can waste a disproportionate share of budget on unqualified clicks.

Local service businesses should also exclude suburb or region names outside their service area, plus “near me” variants for locations they don’t cover. Reviewing your search terms report against a list like this in the first week of a new campaign catches most of the obvious leakage before it compounds.

Negative keywords are ongoing hygiene, not a one-off

The accounts that waste the least money aren’t the ones with the cleverest keyword list. They’re the ones where someone actually checks the search terms report on a schedule and treats negatives as maintenance rather than a launch-day task. A campaign left untouched for three months almost always has a handful of irrelevant queries quietly eating into budget that a ten-minute review would have caught.

The habit matters more than any single clever exclusion. Build the routine, and the list takes care of itself.

— Matthew

How we help with negative-keyword audits and ongoing management

If you’d rather have someone run this hygiene for you, we manage negative keyword audits, shared-list architecture and ongoing campaign cleanup as part of our Google Domination System, built specifically for Australian service businesses that want fewer wasted clicks and more booked jobs.

• We start with an account audit that flags the high-cost irrelevant queries first, then build out shared negative lists so the cleanup sticks.
• We provide transparent reporting and real-time dashboards so you can see exactly what’s being excluded and why.
• There’s no long-term lock-in: we work to measurable targets, and if you’d rather pair this with organic growth, our Hybrid Search Marketing package combines paid search management with SEO.

Get in touch through Thegaguy to find out what a proper negative keyword audit could save you.

FAQ

How do I remove irrelevant ads from showing in Google?

Add the irrelevant search terms as negative keywords at the ad group, campaign or account level, which you can do directly from the search terms report according to Google Ads Help. Review that report regularly rather than treating it as a one-time fix, since new irrelevant queries appear as your campaigns keep running.

What are some common mistakes to avoid in Google Ads?

The most common negative keyword mistakes are forgetting to add plural or related forms, since negatives don’t match close variants automatically, and accidentally blocking an active positive keyword with an overlapping negative. Relying too heavily on broad match negatives without monitoring impression share afterwards is another frequent trap.

Should negative keywords be exact match?

Not always: exact match suits surgical, one-off exclusions, while phrase match suits a recurring phrase and broad match suits a wider theme you want blocked entirely. Choose based on how tightly you need to control the exclusion, since each match type behaves differently as described by Google Ads Help.

How do I find the right keywords to exclude in Google Ads?

Start with the search terms report, which shows the actual queries triggering your ads and lets you add irrelevant ones as negatives directly from that view. Sorting by cost or clicks surfaces the worst offenders first, and grouping recurring patterns helps you build broader exclusions instead of handling each term one by one.

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