Flywheel

A self-reinforcing loop where each turn feeds the next, building momentum that compounds. The canonical example is Amazon’s, from The Everything Store: “Lower prices led to more customer visits. More customers increased the volume of sales and attracted more commission-paying third-party sellers… That allowed Amazon to get more out of fixed costs like the fulfillment centers and the servers… This greater efficiency then enabled it to lower prices further. Feed any part of this flywheel, they reasoned, and it should accelerate the loop.” Amazon executives only articulated this loop after about five years. Bezos drew the metaphor from Good to Great, whose author Jim Collins counseled acquiring other firms only “as an accelerator of flywheel momentum, not a creator of it” — hence Amazon’s bias to build rather than buy. The book also contrasts it with eBay, whose flywheel “was flying apart” as the appeal of slow online auctions faded.

In Product Led Growth: The End User Era, the flywheel is the mark of a mature PLG company: “the most mature companies have built a flywheel where their product is acting as the primary driver of acquisition, retention and expansion.” The concept ties to Pricing — low prices → volume → lower costs → lower prices is the same loop expressed through price — and to Customer Obsession, the input Amazon kept feeding.

Context: A flywheel is a heavy rotating wheel that stores rotational energy and smooths out motion; as a business metaphor (popularized by Jim Collins in Good to Great), it describes a system where consistent effort on a few reinforcing levers builds compounding momentum over time.

Where this appears

• The Everything Store — Amazon’s lower-prices-to-more-sellers loop; the Good to Great origin and the build-vs-buy implication; eBay’s flywheel “flying apart.”
• Product Led Growth: The End User Era — the product-as-engine flywheel as the signature of mature PLG companies.
• Pricing — the low-price / volume / lower-cost loop as a pricing flywheel.