A Content Management System (CMS) is an application used to create, edit, manage, and publish content in a consistently organized way, allowing it to be easily modified, removed, and added.

CMSs are frequently used to store, manage, and provide business documentation such as news, articles, operating manuals, technical manuals, sales guides, and marketing brochures. The content can include computer files, images, audio, video, electronic documents, and web content.

We can say that a CMS is similar to a pre-structured website framework (a skeleton), with basic usability, visualization, and administration features readily available. It is a system that allows the creation, storage, and management of content dynamically, through an internet-accessible interface.

A CMS allows a company to have complete autonomy over the content and evolution of its online presence, eliminating the need for assistance from third parties or specialized companies for routine maintenance. The main purpose of a company opting for a CMS is to streamline the process of updating web environments, allowing company employees to directly update their respective areas of responsibility on internet and intranet sites.

Expanding on this experience in the pursuit of agility in updates, quality CMS systems should not require skills beyond the knowledge necessary for a user of a simple text editor. Quality CMS systems should also allow for the alteration of a website's appearance through the use of themes. These themes are packages that include images and font styles that can be easily changed, duplicated, and modified as needed for each website. The appearance of a site is altered simply by changing the theme used by the site.

Does using a CMS system eliminate the need for internet professionals in a company? The answer is no. No CMS on the market, free or otherwise, eliminates the role of a person responsible for its environment, and especially for content creation. The term "internet professionals" is too broad to satisfactorily answer this question. We can separate them into professionals responsible for the technology, infrastructure, and development of the tool, and on the other hand, professionals responsible for creating content for the internet. Both types of professionals, even with third-party companies providing services, will always be necessary, even when using free tools. A content management system requires a hosting infrastructure (servers). Likewise, a CMS requires periodic maintenance to ensure its evolution, updates, and future growth.

Furthermore, new websites are not implemented without knowledge of navigation structure, information structure, content organization, and resource reuse. This work involves systems analysis and a certain level of technical knowledge that will allow for the evolution, quality, and future of a company's internet projects.

A CMS works with CONTENT management. This is not possible without a stable, structured, and organized environment. Main free CMS systems available on the market: One of the most popular content management systems are WordPress and Joomla!, which are PHP-based, open-source systems. Both are used for creating websites and portals. Other examples of CMS are Plone, Liferay, and Drupal, where content editing is easily done directly from the website, and which can also be used for intranet management. Joomla! is also widely used for intranets.