Should I put the same keyword in broad, phrase and exact match campaigns?

You can, but only if you use negative keywords to isolate each tier. Without isolation, all three campaigns will bid on overlapping queries in the same auction, driving up your CPC and making performance data hard to interpret. Add each keyword as a negative exact in any campaign where a more specific match type is also running for that term.

Which match type has the best ACoS on Amazon?

Exact match typically delivers the lowest ACoS because it targets only the specific, confirmed-converting queries you have already identified. Broad match often has a higher ACoS because it triggers on a wider and less predictable range of searches, including some that will not convert. The three-tier structure uses this pattern deliberately: broad and phrase discover, exact delivers efficiency.

How many campaigns do I need for Amazon PPC?

There is no universal answer. A well-structured account may use three to five campaigns per product: one auto, one broad, one phrase, one exact, and optionally one product targeting campaign. Campaign count matters less than campaign clarity: each campaign should have a clear purpose and appropriate negative keywords to keep match types isolated.

Should I run broad, phrase and exact match campaigns together?

Running broad, phrase and exact match campaigns together is a proven approach, but it requires careful setup to prevent the match types from competing with each other for the same shopper searches. When structured correctly, broad and phrase campaigns discover new converting queries while exact match campaigns capture them with precise bid control. A three-tier structure assigns each match type its own campaign with a distinct purpose and bid level. Broad match sits at the top: it captures the widest range of searches and surfaces queries you would not have anticipated. Phrase match sits in the middle: it narrows reach to searches that include your keyword phrase in sequence and acts as a secondary discovery layer with more predictable targeting. Exact match sits at the bottom: it targets only the specific terms you have identified as high performers and bids on them with full precision. Bids typically decrease as you move from exact to phrase to broad. Your best-performing exact match terms justify the highest bids because you know they convert. Broad campaigns should run on lower bids because many of the searches they trigger are exploratory and less likely to convert on the first click. The biggest risk of running all three match types simultaneously is that the same shopper query triggers ads in multiple campaigns, causing them to compete against each other in the same auction. This inflates your CPC and makes it impossible to know which campaign or bid level produced a sale. Negative keywords solve this problem. Once a search term performs well enough to be added to your exact match campaign, add it as a negative exact keyword in your broad and phrase match campaigns. This stops the lower-priority campaigns from triggering on that term. The exact match campaign then owns that query and you control the bid precisely. Three-tier structures work best for established listings with enough data to populate all three tiers meaningfully. A new product with limited keyword data may be better served by just an automatic campaign and a broad match manual campaign at first. Adding phrase and exact match tiers adds management complexity without the data to support them. As your listing matures and you build a list of confirmed exact match converters, a three-tier structure gives you a systematic way to keep discovering new terms through broad and phrase while protecting your best performers in dedicated exact match campaigns. Many sellers find that their broad match tier shrinks over time as the best terms migrate to exact match, which is a sign the system is working correctly.

Running broad, phrase and exact match campaigns together gives discovery reach and bid control. Learn when the three-tier approach works and how to set it up.