Loboski content management system (CMS) is a system that Loboski offers free of charge with all our hosting packages. Our system assists its users in the process of creating, updating and deleting pages on your website without the need to know much about web development. Our CMS enables the organisation, control and publication of documents and other content, such as images and multimedia resources. The Loboski CMS also enables colaborative creation of documents. 

Here is a more specific definition of the concept of Content Management for the web. This is an extract from Wikipedia:

Web Content management systems are often used for storing, controlling, versioning, and publishing industry-specific documentation such as news articles, operators' manuals, technical manuals, sales guides, and marketing brochures. A content management system may support the following features:

• Import and creation of documents and multimedia material
• Identification of all key users and their content management roles
• The ability to assign roles and responsibilities to different content categories or types.
• Definition of the content workflow tasks, often coupled with event messaging so that content managers are alerted to changes in content.
• The ability to track and manage multiple versions of a single instance of content.
• The ability to publish the content to a repository to support access to the content. Increasingly, the repository is an inherent part of the system, and incorporates enterprise search and retrieval.
• Some content management systems allow the textual aspect of content to be separated to some extent from formatting. For example the CMS may automatically set default colour, fonts, or layout.

source: http://en.wikipedia.org/wiki/Content_management_system