A content manager is a member of the content management team; this person is responsible for creating, editing, updating, and posting content. The main responsibility of the content manager is to keep the information relevant, informative, and fresh. For these purposes, content managers use content management software (CMS).
Responsibilities of content managers vary from company to company, so they can also be responsible for repurposing the existing content throughout the site, responding to website feedback, monitoring website traffic, and so on.