A Bixby electrical contractor turns on a Google Ads campaign targeting “electrician,” sets it to broad match because that's the default, and watches the budget disappear within a week. The click volume looks fine. The phone doesn't ring nearly as much as the click count would suggest. Pull the search terms report and the reason is usually right there: clicks from “how to wire a light switch,” “electrician salary Oklahoma,” “electrician trade school near me,” and half a dozen other searches that were never going to become a service call. None of that is a broad match problem exactly. It's a missing negative keyword list problem, and it's one of the most common ways trade businesses burn through ad budget without realizing it.

What Broad Match Actually Does

Broad match tells Google to show your ad for searches it judges as related to your keyword, not just exact or close variations of it. That's useful. It catches phrasing you'd never think to bid on directly, but “related” is a wide net. A keyword like “electrician Bixby” on broad match can trigger on “electrician jobs Bixby,” “how to become an electrician,” or general wiring questions that have nothing to do with hiring someone. Broad match isn't inherently bad; it's just incomplete without a second layer telling Google what not to show for.

The Negative List Is the Other Half of the Setup

A negative keyword list tells Google Ads which searches should never trigger your ad, even if they'd otherwise match. For an electrician, that usually means excluding terms like “how to,” “DIY,” “jobs,” “hiring,” “salary,” “school,” and “training” at minimum, plus anything specific to the business's actual services versus adjacent ones it doesn't offer. Google Ads' own documentation on negative keywords lays out how these exclusions work at the keyword, ad group, or campaign level: the tool exists specifically for this problem, and most accounts running broad match without it are leaving it on the table entirely.

Where the Waste Actually Shows Up

The search terms report inside Google Ads shows the literal phrase someone typed before your ad triggered and they clicked. For an account with no negative list, this report is usually the fastest way to see the problem in plain text: a mix of real service intent next to searches that were never going to convert, all billed at the same cost per click. Reviewing it regularly and adding negatives as patterns show up is standard account management, not an advanced tactic, and it's the difference between a campaign that spends efficiently and one that just spends.

It Adds Up Faster Than It Looks

Individually, a click from someone researching a DIY light switch job doesn't look like much. The problem is volume and repetition. If a meaningful share of daily clicks are DIY questions, job-seeker searches, or unrelated wiring curiosity, that's not a one-time leak, it's a percentage of the budget disappearing every single day the campaign runs, month after month, without anyone noticing unless they go looking for it. A campaign that's quietly losing a third of its spend to irrelevant clicks isn't underperforming because the offer or the service is wrong. It's underperforming because it's paying full price for traffic that was never going to call.

Match Types Matter Too, Not Just Negatives

Negative keywords fix one side of the equation. The other side is being more deliberate about match types on the keywords that are actually working. A campaign that's run entirely on broad match, with no phrase or exact match keywords mixed in for the highest-intent terms, is leaning entirely on Google's interpretation of relevance rather than locking in the searches known to convert. Pairing a lean, well-maintained negative list with a mix of match types: broad for discovery, phrase or exact for the proven performers, tends to give a more predictable account than an all-broad, no-negatives setup.

Building the List Doesn't Take Long

A first negative list doesn't need to be exhaustive. Start with the obvious exclusions: job-seeker terms, DIY terms, training and certification searches, then add to it weekly based on what the search terms report actually shows. Most electrical contractors can get a meaningfully cleaner account within the first month just by reviewing that report and excluding what clearly doesn't belong, without touching bids or budgets at all.