What’s "Content Strategy"? What Does a Content Strategist Do?

(Excerpts)
Content strategy is a relatively new profession, and a big profession. Within it are numerous fields of practice. To use an analogy, talking about content strategy is a like talking about doctors. Doctors range from neurologists to podiatrists, and all body parts in between, but they all started with the basics of anatomy, whether  their specialties ended up being gerontology or pediatrics, psychiatry or orthopedic surgery.
Similarly, content strategy starts with practitioners who understand content at an elemental level that other professions rarely consider. They understand the potential of content in ways that others overlook. They understand how content connects to other content, how the development and delivery of content affects, and is affected by, practices connected to the profession, and how content connects to content consumers.
(Are there any industry-set qualifications for a Content Strategist?…)