Broad match keywords get pitched as a way to find demand you’d never have thought to bid on yourself, and sometimes that’s exactly what happens. Just as often, it quietly spends a growing share of the budget on searches that were never going to convert, and nobody notices until someone asks why cost per lead crept up while impression share looked fine. The campaign isn’t broken. It’s just being run on autopilot, and broad match punishes autopilot faster than any other setting in the account.
Why Broad Match Drifts
Broad match is designed to expand, not to hold still. The algorithm is optimizing for matching volume against your bidding signals, and over time that expansion pulls in search terms that are topically related but intent-mismatched: a B2B software company bidding on “project management” can end up paying for clicks from people looking for a free personal to-do list app. Nothing about the setup is wrong on day one. The drift happens gradually, a few dollars of wasted spend at a time, which is exactly why it’s so easy to miss until it’s a real number.
The Audit Most Accounts Are Skipping
The fix isn’t abandoning broad match. It’s treating the search term report as a living document instead of something you glance at once during setup.
Pull the search term report on a real cadence, not “when something feels off.” Weekly for an active account, monthly at minimum. Waiting for a problem to feel obvious means it’s already been expensive for weeks.
Build a negative keyword list that grows with the account, not a one-time list from launch. Every irrelevant search term you find is a candidate for a negative, and an account that never adds new negatives after the first month is an account that’s stopped paying attention.
Segment negatives by intent, not just by topic. “Free,” “jobs,” “salary,” and “diy” are near-universal negatives for a considered B2B purchase regardless of your specific keyword list, and adding them account-wide catches a category of waste that keyword-by-keyword review misses.
Watch for cannibalization between match types, not just irrelevant terms. If your exact match keyword and your broad match keyword are both eligible for the same high-intent search, you’re bidding against yourself, and the broad match entry is usually the one winning the auction at a worse price.
What Healthy Broad Match Actually Looks Like
Broad match earns its place in the account when it’s paired with tight bidding controls and a negative list that actually keeps pace with what the search term report turns up, not when it’s left to run unsupervised because it was easy to set up once. The accounts that get real incremental reach out of broad match are reviewing it constantly. The ones bleeding budget through it usually haven’t opened the search term report since launch.
Clean campaign structure only pays off if the attribution behind it holds together too. That’s the same discipline behind a UTM naming convention that actually holds: consistent tagging is what lets you tell which campaign, and which match type, is actually earning its spend.
If your search term report hasn’t been reviewed in a while, let’s take a look at what it’s costing you, or see how this fits into our search engine marketing work.