Negative Keywords for Service Businesses
A search for “office cleaning services” and a search for “office cleaning jobs” contain similar words, but only one is likely to come from someone looking to hire a cleaner. For a service business paying for Google Ads, that difference matters.
Negative keywords tell Google Ads which searches to exclude. Used carefully, they help you avoid irrelevant traffic while keeping your ads eligible for customers you can serve. This guide shows service businesses how to choose exclusions for Google Search campaigns, apply them at the right level and review their effect on lead quality.
Start with the searches behind your clicks
A keyword is a targeting term you add to an ad group. A search term is what someone actually typed. Review both: a relevant keyword can attract searches with very different intentions.
Open your Search campaign's search terms report and review the queries alongside spend, matched keywords and recorded conversions. Google's search terms report guidance explains what these fields mean. Some low-activity queries are omitted for privacy, so the report does not show every search.
Before making exclusions, write down the services you sell, customers you accept and locations you cover. Include boundaries such as commercial work only or installation without equipment sales. These details turn a vague judgment about “bad traffic” into a clear business decision.
Choose between negative broad, phrase and exact match
Google's negative keyword match rules distinguish three options for Search campaigns:
Broad: blocks searches containing all the negative words, in any order.
Phrase: blocks searches containing the negative words together in the same order, even with extra words.
Exact: blocks the matching search in the same order, without extra words.
Each row below shows one exclusion acting alone:
Negative keyword | Blocked example | Not blocked by this exclusion |
Broad: cleaning jobs | jobs in cleaning | cleaning careers |
Phrase: "cleaning jobs" | office cleaning jobs | jobs in cleaning |
Exact: [cleaning jobs] | cleaning jobs | office cleaning jobs |
“Not blocked” does not guarantee an ad will appear; other eligibility conditions still apply.
Negative matching differs from positive keyword matching. Add relevant singular, plural and synonym forms separately when needed: excluding jobs does not also exclude job or careers. Google's current guidance says capitalization and misspellings are handled automatically.
A worked example: keep, exclude or investigate?
Imagine an office cleaning company that serves Chicago businesses, offers free estimates and does not sell supplies or recruit through its customer-acquisition campaign. These are illustrative queries, not results from a client account.
“Office cleaning services Chicago” — keep. The service, customer type and location fit. A few clicks without an inquiry are not enough to establish that the search is unsuitable.
“Office cleaning jobs Chicago” — exclude from this campaign. The intent is employment. Adding [office cleaning jobs chicago] as an exact negative at campaign level blocks this query throughout the customer campaign while leaving the separate recruitment campaign unaffected.
“Buy office cleaning supplies” — exclude. The company sells a service, not supplies. An exact exclusion can address this query; a broader exclusion needs a reason that applies to the other searches it would block.
“Free office cleaning estimate” — keep. The company offers precisely that. Excluding the single word free could remove a useful inquiry.
“Office cleaning prices” — investigate. A price comparison can come from a serious buyer. Check whether the ad and landing page explain the offer, then use inquiry feedback to assess fit.
The decision depends on what you sell and what the search means. A generic exclusion list cannot make that decision for you.
Apply exclusions without blocking useful demand
1. Choose the smallest useful exclusion
When one specific query is the problem, start with that query. Use a wider phrase or broad exclusion only when the wider group is clearly irrelevant. For example, excluding cleaning would undermine an office cleaning campaign; the unwanted intent sits in the rest of the query.
Before saving, compare the proposed exclusion with searches you want to keep, your service names and genuine offers. Ask: would it also block a customer searching for something we sell?
When you add negatives from the search terms report, Google defaults Search exclusions to exact match. Check the saved match type rather than assuming every related search is now blocked.
2. Check which campaigns the change affects
An ad-group exclusion has a narrower scope than a campaign exclusion. Shared lists can affect multiple campaigns. Inspect where a list is applied before editing it.
A cleaning business might separate office and residential services into different campaigns. A term that does not fit the office campaign may still matter to the residential one. The same applies to a separate recruitment campaign: employment searches should not automatically be excluded everywhere.
3. Record the reason and review date
Keep a short change log with the term, match type, affected campaign or list, date and reason. “Employment query in customer campaign” is more useful than “poor performance.” It explains the decision and makes a mistaken exclusion easier to find.
For a modest account, a weekly search-term review is a practical starting point. Review sooner after launches or targeting changes, or when spend is accumulating quickly. Treat this as a working routine, not a universal schedule or a requirement to add new negatives every week.
Judge the results by qualified inquiries
Track how many inquiries meet your service, location and customer requirements, alongside the ad spend needed to generate them. Apply the same qualification criteria before and after the change, and give recent leads time to be assessed.
Ad cost per qualified inquiry = ad spend ÷ qualified inquiries. For example, $600 spent to generate six qualified inquiries equals $100 each. This is an illustrative calculation, not a performance benchmark.
Read that cost alongside qualified inquiry volume. A lower cost accompanied by a sharp drop in useful inquiries may not support your growth goal. If there are no qualified inquiries, report zero qualified inquiries and leave cost per qualified inquiry uncalculated.
If relevant traffic drops unexpectedly, review recent exclusions along with changes to budget, targeting, demand and the landing page. Remove mistaken exclusions when you find them. A before-and-after comparison alone does not prove which change caused the result.
When negative keywords are only part of the problem
If searches are relevant but people still do not inquire, examine the offer, landing page, tracking and booking flow. Our Google Ads clicks-but-no-leads checklist walks through those checks.
Need help deciding which searches deserve your budget? Explore DIGITALTHROB's Google Ads services or book a strategy call to discuss your campaign. Bring your service area, priority services and current lead-quality concerns so the discussion starts with your business goals.
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