Broad vs Phrase vs Exact Match for Book Ads
Updated 2026-07-15
Every keyword in an Amazon Sponsored Products manual campaign has a match type: broad, phrase, or exact. The match type controls how closely a shopper's search has to match your keyword before your ad is eligible to show. Using all three deliberately is one of the easiest upgrades to an author ad campaign.
Broad match
Broad match shows your ad on searches that contain your keyword's words in any order, plus close variations, plurals, and related terms. "cozy mystery" broad can match "best cozy mysteries 2026" or "mystery cozy series".
Broad is your discovery engine: it finds search terms you would never think of. The trade-off is wasted spend on loosely related searches, which is why broad match campaigns need negative keywords and regular search-term reports review.
Phrase match
Phrase match requires the search to contain your keyword as a phrase, in order, possibly with words before or after. "cozy mystery" phrase matches "new cozy mystery books" but not "mystery cozy".
Phrase is the middle ground — decent reach with much tighter relevance than broad.
Exact match
Exact match shows your ad only when the search is your keyword (or a very close variant like a plural). It has the least reach and typically the best conversion rate, so it usually deserves your highest bids.
A simple structure that works
This "harvesting" loop — discover in broad, confirm in phrase, scale in exact — is the core of most professional Amazon Ads keyword strategies. Our free tool generates the three match-type variants for every keyword automatically, so you can set this structure up in minutes.
- Run the same keyword list in all three match types, with bids scaled: exact highest, phrase middle, broad lowest.
- Review the search term report every 1–2 weeks. Move converting search terms from broad/phrase into exact.
- Add non-converting search terms as negative keywords so broad match stops spending on them.