Amazon PPC Bid Optimizer

Worked example

A sample keyword, run through the Amazon PPC bid optimizer.

Pro tips: getting the most from the Bid Optimizer

The optimizer computes a recommended bid from your target ACoS, price and conversion rate — recommended bid = target ACoS × price × CVR. These five practices keep that math honest.

Set the mode before you trust the number

The campaign-mode switch isn’t cosmetic: Launch presets a 60% target ACoS (you’re buying data) while Profit presets 20% (you’re defending margin). Since the whole formula keys off target ACoS, the same keyword with the same price and CVR gets a very different bid in each mode. Pick the mode that matches the campaign’s actual job before you read the recommendation.

Respect the 20% budget guardrail

If you enter a daily budget, the optimizer caps the recommendation at 20% of it — one keyword should never be able to eat the whole budget in a few clicks. When the guardrail fires, the message isn’t “this keyword is bad”; it’s “your budget is too thin for this keyword at this bid”. Either raise the budget or accept fewer impressions, but don’t override the cap blindly.

Add unit profit to unlock the CPA check

Target ACoS is a goal; unit profit is reality. Enter your per-unit profit and the optimizer compares cost-per-order at the recommended bid against it: comfortably below 80% of profit is healthy, near 100% is marginal, above it means you’re losing money on every order. If the benchmark check comes back red, lower the bid or fix conversion first — no ACoS target can save an unprofitable unit.

Re-run after 20–30 clicks, not after 3

The recommendation is only as good as the CVR you feed it, and CVR needs data. The tool’s ±15% keep-band exists to stop you churning bids on noise — if the verdict says “keep”, hold steady and come back after 20–30 more clicks. Optimizing on a dozen clicks is just reacting to randomness with extra steps.

Use the what-if rows to sense-check your data

The 80% and 120% CVR rows show how sensitive the recommended bid is to your conversion rate. If a small CVR swing moves the bid by 40%, your sample is too small to trust — gather more clicks before acting. If the bid barely moves, your CVR is stable and the recommendation is solid. Sensitivity is information; use it.

Frequently asked questions

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