CMS: What is it and why do I care? Ipstenu (Mika Epstein) · Feb 2, 2004 · CMS. Content Content Management System. A website where the admin, as a user or as a group of users, are able to control the content. If you're anything like me, you read that and said 'Yeah, … [Read more...] about CMS: What is it and why do I care?