Dynamic bidding lets Amazon raise or lower your bid in real time based on conversion likelihood: down-only, up-and-down, or fixed.
Dynamic bidding is Amazon's real-time bid adjustment on Sponsored Products. Three strategies:
Down only: Amazon lowers your bid (up to 100%) in auctions it predicts are unlikely to convert. The safe default.
Up and down: Amazon may also raise your bid — up to +100% for top-of-search, +50% elsewhere — when conversion looks likely. More volume, more variance; only worthwhile once a campaign is profitably converting.
Fixed: your bid is your bid. Useful for visibility-first campaigns where you want impressions regardless of Amazon's conversion predictions.
Dynamic bidding stacks with placement boosts, so an aggressive combination can multiply your effective bid several times over — know your stack before raising anything.
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