A keyword in Google Ads is not just a word. It comes with a match type that tells Google how closely a person's search has to resemble it before your ad can appear. Choose well and your budget goes to relevant searches. Choose badly and it goes almost anywhere.
Broad match
Broad match is the default and the loosest setting. Your ad can show for searches that relate to your keyword, including ones that do not contain the words at all. It reaches the most people and relies heavily on Google's judgement of relevance. Used with good conversion tracking and smart bidding it can find valuable searches. Used carelessly it finds expensive, irrelevant ones.
Phrase match
Phrase match shows your ad for searches that include the meaning of your keyword. Extra words can come before or after, and Google allows close variations, but the search has to carry the same intent. It is a middle ground: wider than exact, more controlled than broad. Many small accounts do most of their work here.
Exact match
Exact match is the tightest. Your ad shows for searches that mean the same thing as your keyword, including close variants such as plurals, misspellings and reordered words. You get the most control and the least reach. It suits your best, proven keywords, where you want to bid confidently and know exactly what you are paying for.
How to choose on a small budget
With limited spend, control matters more than reach. Start with phrase and exact match on a short list of keywords that clearly signal someone wants your service. Watch the search terms report to see what people actually typed. Only test broad match once tracking is solid and you have enough conversion data for automated bidding to learn from.
Match types need negatives
Whichever match types you use, some unwanted searches will get through. The search terms report shows them, and negative keywords block them. Reviewing that report regularly and adding negatives is not optional housekeeping. It is how an account gets sharper over time instead of slowly drifting toward irrelevant traffic.
Match types are one of the first places we look when auditing an account, because a single loose keyword can absorb a large share of the budget. If you want a second pair of eyes on yours, get in touch.