Mistakes
Negative Keywords for Small Business Campaigns
Negative keywords stop ads from showing for searches that are unlikely to become good customers. They are one of the simplest ways to protect a limited budget.
Start with obvious exclusions
Common exclusions include free, cheap, jobs, salary, template, DIY, training, and unrelated product names. The right list depends on the business.
Review search terms often
Early campaigns should be reviewed frequently. Search term reports show how real users phrase their needs and where budget is leaking.
Avoid blocking useful intent
Negative keywords can also block good traffic if used carelessly. Add them with enough specificity to remove waste without hiding valuable searches.
Use match types carefully
A broad negative can block more traffic than expected. Phrase and exact negatives can be safer when the account is new because they remove specific poor searches without cutting off related high-intent searches.
Build lists by theme
Separate negatives into themes such as jobs, free resources, DIY searches, competitor confusion, irrelevant products, and unsupported locations. Organized lists are easier to review and less likely to create accidental coverage gaps.
Review before scaling
Before increasing budget, check whether the campaign is still spending on terms that cannot become customers. Cleaning search terms before scaling helps avoid multiplying the same waste.
Start with business rules
Negative keywords should reflect what the business cannot or does not want to sell. Unsupported services, low-value jobs, hiring searches, free resources, and out-of-area terms are common starting points.
Review negatives before major changes
Before launching new ad groups or broadening match types, review the negative keyword list. A list that was safe for one campaign may block useful searches in another campaign.
Document why a negative was added
When teams forget why a term was blocked, they may remove useful protections later. A simple note beside important negatives can prevent confusion during account cleanup.
Treat negatives as protection for a specific offer
Negative keywords are not a generic “bad traffic” list. They protect the budget from searches the business cannot or does not want to serve. Start with categories that are easy to verify: jobs and careers, training, DIY instructions, parts-only searches, free requests, competitor support requests, and locations outside the service area. Then compare every proposed negative against real search-term data before adding it.
An exclusion can block a valuable query if it is too broad. A roofing company might exclude “DIY” while retaining “roof repair estimate”; it should not automatically exclude “repair” because repair is an offered service. Keep a note describing the reason, match type, campaign, and date for each important negative.
Review search terms using lead outcomes
Do not optimise only on clicks or cost. Mark whether each meaningful query produced a serviceable enquiry, a qualified opportunity, or a sale where that information is available. A high-cost query may be worth keeping if it produces valuable jobs; a cheap query that repeatedly produces irrelevant calls deserves scrutiny.
Google’s keyword workflow includes choosing a match type when terms are added to Search campaigns. Review the current product guidance before changing match-type strategy: https://support.google.com/google-ads/answer/7476658
A weekly workflow for a small account
- Export or review search terms after there is enough spend to identify patterns.
- Label each term: relevant, uncertain, irrelevant, or potentially valuable but missing a page.
- Add a negative only when the reason is clear and documented.
- Check that the new exclusion has not blocked a core service term.
- Feed recurring customer language into ad copy or landing-page improvements.
Worked example: a landscaping company's negative list
A landscaping company selling lawn care and hardscaping services launches a broad-match campaign around "landscaping" and "lawn care." After the first week, the search-term report shows real spend on: "landscaping design jobs near me" (job search), "diy landscaping ideas" (research), "landscaping pictures" (research), "landscaping company logo ideas" (unrelated), and "commercial landscaping bids" (a service this residential-only business does not offer).
The team builds five negative-keyword lists by theme: jobs and careers ("jobs," "hiring," "salary," "resume"), DIY and research ("diy," "ideas," "pictures," "how to"), unrelated services ("logo," "software," "app"), out-of-scope work ("commercial," "hoa," "municipal" — outside what a residential crew handles), and out-of-area terms for neighboring cities the company does not serve.
After adding the lists, weekly spend on irrelevant searches drops from around 40% of total spend to under 8%, without reducing the number of qualified estimate requests. The remaining budget concentrates on searches like "lawn care service [city]" and "landscaping company near me" — where the qualified leads were already coming from.
Common negative keyword mistakes
Adding a negative that blocks a core service term. A company excluding "design" to filter out "landscaping design jobs" can accidentally suppress "landscape design consultation" — a real service. Match type and phrase-level context matter more than the presence of one word.
Never reviewing the list after it is built. A negative list built in month one can become outdated as the business adds new services or expands into a new area. An old negative can silently block a service the company now offers.
Adding negatives without checking actual search-term data. Guessing at exclusions based on assumptions, rather than the search-term report, can remove searches that were actually converting well.
Treating account-level and campaign-level negatives the same way. A negative that makes sense for a residential-only campaign can be wrong for a separate commercial-services campaign running in the same account.
Frequently asked questions
How often should the negative keyword list be reviewed? Weekly during the first month, then at least monthly once the account is stable. New services, new locations, or seasonal changes usually require an update to the list.
Can too many negative keywords hurt a campaign? Yes. An overly broad negative list can quietly exclude relevant searches, especially when built from assumptions instead of real search-term data. Review each addition against the possibility that it also blocks a wanted search.
Should negative keywords be shared across all campaigns? Shared lists work well for exclusions that apply everywhere, such as job searches or unrelated products. Location-specific or service-specific negatives usually belong at the campaign level instead.
The goal is not the longest negative-keyword list. It is a more intentional path from search to a service the business can deliver.