For new initiatives a product manager typically starts by writing an internal press release announcing the finished product. The target audience for the press release is the new/updated product’s customers, which can be retail customers or internal users of a tool or technology. Internal press releases are centered around the customer problem, how current solutions (internal or external) fail, and how the new product will blow away existing solutions.
via (39) What is Amazon’s approach to product development and product management? – Quora.