Content strategy refers to the planning, development, and management of content. In other words, content strategy plans for the creation, publication, and governance of useful, usable content.
The purpose of content strategy has been described as achieving business goals by maximizing the impact of content.
Necessarily, the content strategist must work to define not only which content will be published, but why we are publishing it in the first place. Otherwise, content strategy is not strategy at all: it is just a glorified production line for content nobody really needs or wants.