Straight answers for local service businesses
You block DIY searches by adding negative keywords for instruction and tutorial language ("how to," "diy," "tutorial," "video," "step by step"), plus tool, part, and hardware store terms that only a do-it-yourselfer would type. Pull your search terms report every week or two, and add negatives at the campaign level so they apply everywhere. Use phrase match negatives for word patterns like "how to" and exact match for single words you want to keep out. Just don't get overzealous: "how much," "cost," and "replace" are buyer words, not DIY words.
Because Google matched your keyword to their question, and your ad was the first blue link they saw.
Someone types "how to fix leaking shut off valve." You bid on "leaking shut off valve" in broad or phrase match. Google decides that's close enough. Your ad shows, they click, they read for eight seconds, they leave. You paid anywhere from six to sixty dollars depending on your trade and market.
The frustrating part is that DIY clicks look exactly like good clicks in your reports. Traffic is up. Click-through rate is fine. But nobody calls. If your account shows plenty of clicks and a quiet phone, DIY intent is one of the top three places the money is going.
Open your search terms report and sort by cost. Not by clicks, by cost. You're looking for the actual phrases people typed, not the keywords you chose.
Then scan for four patterns:
Every one of those is somebody who has already decided not to hire you. They're doing research. Nothing wrong with that. It just isn't your ad budget's job to fund it.
Start with a campaign-level negative keyword list so it covers every ad group at once. Here's the core set that applies to nearly every trade:
Then add your trade's specific tool and material words. A drain cleaner blocks snake, auger, and plunger. A painter blocks paint sprayer, roller, primer, and color chart. An electrician blocks wiring diagram, breaker (if you don't sell panel work by part), and multimeter. An HVAC tech blocks filter size, capacitor, and freon can.
Google generally does not apply close variants to negative keywords the way it does to your regular keywords. If you block tutorial, you may still show for tutorials. If you block lowes, lowe's can slip through. Add the plural, the possessive, and the common misspelling. It takes an extra two minutes and it's the difference between a negative list that works and one that just looks like it does.
This is where people overcorrect and blow up their own lead flow. Be careful with these:
The underlying rule: block the words that describe doing the work, not the words that describe the work itself.
Occasionally, and it's worth knowing when. There's a real customer type who starts a job, gets halfway in, and calls a pro at 7pm with the water off. Those searches usually read like "how to fix" plus panic language: "can't get," "stuck," "broke," "made it worse," "water everywhere."
If you've got budget to spare and you like emergency work, you can build a small separate campaign targeting exactly that. Tight keywords, its own budget cap, ad copy that says "we'll finish what you started." But do that on purpose, in its own campaign, with a spend limit. Never leave it running by accident inside your main campaign, because you can't tell the difference between a panicked homeowner and a curious one until after you've paid for the click.
Negatives are the blunt tool. Your ad copy is the filter that runs in front of them.
Weekly for the first month a campaign runs, then every two weeks. New search terms show up constantly, especially as seasons change. A landscaper's DIY leak in April looks nothing like the one in October.
Fifteen minutes with the search terms report, sorted by cost, adding five or ten negatives at a time. That's the whole job. Most small accounts that do this consistently end up spending the same money on noticeably fewer, better clicks within a month or two.
And if your ads are already clean but the calls still aren't coming, the leak has moved downstream to the page people land on. That's a different fix, and usually a cheaper one.
Use a shared negative keyword list applied to all your search campaigns. That way one edit covers everything, and you don't have to remember to copy your DIY blocks into every new campaign you build.
Use phrase match for word patterns like "how to" or "do it yourself," since that blocks any search containing that sequence. Use exact match when you only want to block a standalone term and not related searches that might still be valuable.
Impressions will drop, and that's the point. Quality Score usually improves, because the people who do see your ad are more likely to click and convert.
There's no practical limit that a local service business will hit. The real risk isn't quantity, it's blocking a word that buyers also use, like "cost" or "replace." Add negatives from your actual search terms report rather than from a generic list you found online.
No. Organic traffic is free, so a DIY visitor costs you nothing. In fact, a how-to article that ranks can build trust and bring the same person back when the job turns out to be bigger than they thought.
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