Explanation:

Product marketing is a strategic marketing function that bridges the gap between product management and marketing communications. The primarily role of a product marketing manager is to define and size target markets and value propositions. Other critical responsibilities include positioning and sales enablement.

Product management deals with the basics of product development within a firm, whereas product marketing deals with marketing the product to prospects, customers, and others. Product marketing, as a job function within a firm, also differs from other marketing jobs such as social media marketing, marketing communications  online marketing, advertising, marketing strategy, and public relations, although product marketers may use channels such as online for outbound marketing for their product.