The Wandering Maw
Broad Match
Broad match is a keyword matching option that shows your ad for searches Google judges related to your keyword's meaning, not just its words. It is the default match type in Google Ads and relies on machine learning signals such as landing page content, other keywords in the account, and past search patterns to decide what counts as related.
It has no fixed shape. Point it at 'running shoes' and it will wander into 'marathon training plans,' 'foot pain remedies,' or wherever the algorithm senses hunger. Left alone in an account with no negative keyword list and no Smart Bidding target, it eats the daily budget on searches that only loosely resemble what you sell.
Professionals pair broad match with strong conversion data, an aggressive negative keyword list, and a Smart Bidding strategy that has enough conversion volume to actually learn from, then watch the search terms report weekly to keep it fed on the right things.