Key takeaways
- Bids are maximums; set them from economics.
- Choose bidding strategy by objective.
- Review placement performance.
- Change gradually with enough data.
Bids are maximums
A bid is the most you are willing to pay for a click. What you actually pay can be lower, depending on competition. Setting bids from your economics, not from guesses, is the foundation of efficient advertising.
Bidding strategy options
Amazon offers strategy settings that adjust bids in real time based on likelihood of conversion. Options typically include lowering bids when a click looks less likely to convert, raising and lowering based on likelihood, or keeping bids fixed. Each has trade-offs between control and automation.
- Down only: cautious, protects budget
- Up and down: aggressive for conversions
- Fixed: predictable, manual control
- Choose by objective and margin
Placements
Ads can appear at the top of search results, on product pages or in other search positions. Placement performance differs by product and category. Review placement reports and consider adjustments when one placement clearly outperforms another.
Start from break-even
Calculate the maximum cost per click that keeps you at your target, using conversion rate and price. Set bids around that limit, adjusting for strategic goals such as launch.
Adjust gradually
Change bids in modest steps and wait for enough data. Overreacting to a few days of results can cause volatility.
Use data thresholds
Do not make decisions with too little data. Set minimum click counts before pausing or raising bids, and consider conversion rate variation.
Seasonality and events
During peak periods, competition and conversion shift. Review bids more often and be ready to adjust budgets and targets.
A worked example
A seller finds that top-of-search placement converts much better than other placements for a key product. They raise the placement adjustment and reduce base bids, so the product appears more often in the profitable position while limiting spend elsewhere.
Bid review checklist
Weekly: review top spenders, compare cost per click with break-even, check conversion rate, review placement report, adjust gradually and log changes.
Questions to ask before changing a strategy
What is the goal? Do I have enough data? What is the risk if conversion changes? How will I know whether the change worked? Define the test and review date in advance.
Estimating a sensible maximum bid
A rough method is to multiply your product price by your target advertising cost of sales and by the conversion rate. The result is the cost per click at which you break even on the target. If a product sells at a given price, converts at a given rate and you accept spending a set share of revenue on ads, the formula yields a ceiling for bids.
Treat the number as a guide, not a rule. Strategic bids above it may be justified for launches, while mature products should usually sit below it.
Your next three steps
Make bidding decisions from numbers instead of instinct.
- Calculate break-even cost per click for your five biggest products.
- Compare placement performance and note any clear winner.
- Change bids in small steps and set a review date for each change.
Frequently asked questions
Which bidding strategy is best?
It depends on goals, margin and data. Test and compare.
How often should I change bids?
Regularly, but avoid overreacting to small samples.
This guide is general information. Amazon's fees, policies and program rules change and vary by marketplace, so confirm current details in Seller Central and, for tax or legal questions, with a qualified adviser.