Please keep in mind that our sales rank figures are simply meant to be a guide of general interest for the customer and not definitive sales information for publishers—we assume you have this information regularly from your distribution sources
— Amazon.com Help[90]
Friday, January 6, 2017
Amazon sales rank
The Amazon sales rank (ASR) provides an indication of the popularity
of a product sold on any Amazon locale. It is a relative indicator of
popularity that is updated hourly. Effectively, it is a "best sellers
list" for the millions of products stocked by Amazon.[86]
While the ASR has no direct effect on the sales of a product, it is
used by Amazon to determine which products to include in its
best-sellers lists.[86]
Products that appear in these lists enjoy additional exposure on the
Amazon website, and this may lead to an increase in sales. In
particular, products that experience large jumps (up or down) in their
sales ranks may be included within Amazon's lists of "movers and
shakers"; such a listing provides additional exposure that might lead to
an increase in sales.[87] For competitive reasons, Amazon does not release actual sales figures to the public. However, Amazon has now begun to release point of sale data via the Nielsen BookScan service to verified authors.[88]
While the ASR has been the source of much speculation by publishers,
manufacturers and marketers, Amazon itself does not release the details
of its sales rank calculation algorithm. Some companies have analyzed
Amazon sales data to generate sales estimates based on the ASR,[89] though Amazon states:
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