Amazon terms explained: BSR, Featured Offer, and review pools

By Scoutvo · Published June 17, 2026 · Updated October 16, 2026 · 5 min read

ASIN, SKU, parent, and child

An ASIN identifies an Amazon catalog product. A SKU is the seller’s inventory identifier; it is not a universal identifier for every merchant selling that product. Keep the marketplace with the ASIN so the observation is unambiguous.

A parent groups related child products and is not itself buyable. A child ASIN represents a purchasable option. The permitted variation theme describes the difference, such as an eligible color or size. One family can contain multiple children, so family counts and child counts must not be treated as equivalent. See Amazon's variation guide and our family checklist.

BSR: Best Sellers Rank

BSR describes a product’s sales rank relative to other products in an Amazon category. Lower numbers indicate a higher relative sales position in that category. Amazon’s BSR explanation describes recent and historical sales as inputs, with more weight on recent sales. It also distinguishes BSR from search rank and states that page views and customer reviews do not determine BSR.

BSR is not units sold, revenue, profit, product quality, or position for a particular search phrase. A product may have ranks at different category levels. Compare the same marketplace and category node over time; a rank of 100 in a broad category and a rank of 100 in a narrow subcategory do not describe the same competitive position. Missing rank is missing data, not evidence of zero sales.

Illustrative comparison: two products each display “#12,” but one rank belongs to category node X and the other to node Y. The numbers do not establish a tie. A usable record would contain marketplace, exact node ID and name, child ASIN, rank, and collection timestamp with timezone. These placeholder nodes are explanatory examples, not a measured category dataset.

Sales and revenue estimates

A third-party sales estimate is a model output. Its inputs may include rank, historical observations, and additional vendor data. Check the provider’s methodology rather than assuming every model is a simple BSR formula. Compare compatible time windows and document the marketplace, category coverage, refresh time, and uncertainty.

Estimated units multiplied by an observed price produce an estimated gross sales value under stated assumptions. That is not observed revenue or profit. Discounts, offer changes, returns, taxes, and costs can change the interpretation. Use a range or scenario for planning when suitable; use your own authorized account records for actual business performance. There is no defensible universal error percentage for all products and tools.

Featured Offer: the offer shown for purchase

The area often called the Buy Box is now described by Amazon as the Offer Display containing one or more Featured Offers. It links a product to purchasable offers from merchants. This differs from the product catalog entry itself. Amazon’s Featured Offer guide discusses total price, delivery, stock, and customer service, and explains that directly fulfilled offers can also compete.

A competitive item price alone does not guarantee placement. Record seller identity, shipping charge, delivery promise, condition, destination, and observation time. Customer context can affect what is displayed. A single observation is not a seller’s share of purchases or proof of why an offer changed. An account metric labeled Featured Offer percentage also needs its reporting definition and date range; it is not automatically a market-wide sales share.

Ratings, reviews, and a review pool

Rating refers to the star assessment; a written review contains customer text. Interfaces and reports may use these labels differently, so preserve the original field name. A “review pool” is shorthand for the feedback displayed or analyzed for a product or eligible group. It is not a formula that multiplies stars, count, and velocity into trust.

Review velocity means the rate of newly observed feedback over a defined period. State the dates and sampling gaps; removals or aggregation changes can make a simple count difference misleading. Review themes describe what sampled reviewers mention. They do not establish the motivations of every buyer or prove that a feature caused sales.

Amazon’s 2026 policy announcement restricts variation review sharing to eligible minor differences without a functional change. Do not infer that every child has the same review pool, or that a changed displayed count means all underlying reviews disappeared.

Keyword occurrence, search volume, rank, and conversion

Competitor vocabulary is useful for building candidate phrases. Validate product relevance and claim support before editing, then use appropriate account or query data to investigate performance. Our keyword guide separates vocabulary coverage from demand and purchase evidence.

A five-question check for any report

1. Does the row describe a product, child, family, seller, or offer?
2. Which marketplace, category, and time window does it cover?
3. Is the number observed, calculated, estimated, or inferred?
4. What is the denominator, and how are missing values handled?
5. Which decision can this evidence support, and what additional check is needed?

Scoutvo’s methodology describes evidence boundaries for category analysis. Keep those boundaries next to the decision: an observed field gap suggests a product-data check, while a changing Featured Offer suggests an offer investigation. Neither finding alone quantifies lost revenue.