Rule-based bidding in Amazon ads is bidding where a bid changes automatically whenever a stated condition is met, for example 'if ACoS is above 30% for 14 days, cut the bid by 15%'. Amazon offers a rule-based bidding option for Sponsored Brands with a return-on-ad-spend guardrail, and most third-party PPC tools offer if-then rules across all campaign types.
A rule has three parts: a condition, a lookback window and an action. The condition is a metric threshold such as ACoS above 30% or zero orders. The lookback is how many days of data the condition is tested on. The action is a bid change, usually a percentage. Software checks each keyword against the rule on a schedule and applies the action wherever the condition holds.
Worked example: a keyword bid is ₹12. Over the last 14 days it has 40 clicks, ₹480 of spend and ₹1,260 of sales, an ACoS of 38%. A rule that says 'ACoS above 30% with at least 20 clicks: lower bid by 15%' fires and sets the bid to ₹10.20. A second rule, 'ACoS below 15% with at least 3 orders: raise bid by 10%', would take a winning keyword from ₹12 to ₹13.20.
Amazon's own version sits inside Sponsored Brands. You pick a ROAS guardrail and Amazon adjusts bids to try to hold it, with a minimum campaign history before it can be selected. Sponsored Products has no rule-based option in campaign manager; it has dynamic bidding, which reacts to the likelihood of conversion rather than to a rule you write.
Rules act on attributed data, and Amazon attributes orders for up to seven days after a click on seller accounts. A rule that looks at the last three days sees spend without the sales that will arrive later, judges every keyword too harshly and cuts bids that were fine. Lookback windows shorter than a week are the most common cause of accounts that slowly starve.
Rules also compound. A 15% cut applied every day for a week takes a ₹12 bid to about ₹3.80, at which point the keyword stops winning impressions and the rule can no longer learn anything. Good rule design includes a floor bid, a minimum number of clicks before firing and a cooling-off period.
BlooprintAI does not run automatic bidding rules. It uses the same filters a rule would use, such as ACoS above a threshold with enough clicks, but shows you the matching keywords with a suggested bid, lets you edit the list, and applies the change in bulk only when you confirm. Every run shows a summary first and leaves a log. The judgement stays with you; the row-by-row work does not.
Blooprint's glossary on blooprint.in explains dynamic bidding; the comparison pages here cover which tools run true rules.
Filter keywords by ACoS, CPC and CVR, review suggested bids and apply them in bulk.
Learn more →The wider practice rules belong to, manual and automatic.
Learn more →Amazon's built-in adjustment that is often mistaken for a rule.
Learn more →When rules pay off and when reviewed bulk changes are the safer choice.
Learn more →It means a bid is changed automatically when a condition you set is true, for example lowering a bid by 15% if ACoS has been above 30% for 14 days. The rule replaces the manual check.
Yes, for Sponsored Brands: a bidding option with a ROAS guardrail that Amazon adjusts bids to hold. Sponsored Products has dynamic bidding, which is not a rule you write.
No. It filters keywords by ACoS, CPC, CVR and spend, shows suggested bids, and applies your changes in bulk after you review a summary. Nothing changes without you confirming it.
At least 14 days on Amazon, so the seven-day attribution window has closed on most of the data. Rules on three-day windows cut bids on keywords whose orders have not been attributed yet.
No. A rule is a fixed if-then statement you can read. AI or algorithmic bidding predicts an outcome and sets the bid itself, without a rule you can inspect.
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