Keyword match type

Advertisers do not list every possible search. They choose keywords and a match type that controls how far the platform may stretch them. Google Ads has three. Broad match, the default, can show the ad on searches related to the keyword, even ones that do not contain its direct meaning. Phrase match shows on searches that include the meaning of the keyword. Exact match shows only on searches with the same meaning or intent, giving the most control and the least reach.

Match types explain a puzzle in search arbitrage: why an ad for one thing appears on a query about something slightly different. With broad match and automated bidding, an advertiser who bought "car insurance" may appear on a related-search term such as "cheap cover for new drivers".

For publishers, broad matching increases coverage, since more advertisers qualify for each query. For advertisers, it is also how spend drifts onto partner-site queries they never pictured, which they later find in the search terms report and block with a negative keyword.

Arbitrageurs buying search clicks themselves use tighter match types to keep CPC and intent predictable.

Think of it like this

It is the difference between telling a shop assistant "bring me exactly this shoe", "something like this shoe" and "anything a person who likes this shoe might want".