Content Marketing [CM] means creating and publishing content that establishes your E-A-T (Expertise, Authority, and Trustworthiness) in a specific area. Content Marketing means creating pages which provide useful, accurate, valuable information to some group of people in the hope that Google will index those pages and show them to relevant queries. An example of content marketing is the page you are reading now, which is a glossary of SEO and SEM terms.
Celebrating 25 Years of Creating an Island of Stability In the Sea of Online Confusion