Content management system

A content management system (CMS) is a computer software used to manage the creation and modification of digital content.
A CMS is typically used for enterprise content management (ECM) and web content management (WCM).
ECM typically supports multiple users in a collaborative environment by integrating document management, digital asset management, and record retention.
Alternatively, WCM is the collaborative authoring for websites and may include text and embed graphics, photos, video, audio, maps, and program code that display content and interact with the user. ECM typically includes a WCM function. CMS is a web template to create your own website.
Structure.
A CMS typically has two major components: a content management application (CMA), as the front-end user interface that allows a user, even with limited expertise, to add, modify, and remove content from a website without the intervention of a webmaster; and a content delivery application (CDA), that compiles the content and updates the website.
Installation type.
There are two types of CMS installation: on-premises and cloud-based. On-premises installation means that the CMS software can be installed on the server. This approach was usually taken by businesses who wants flexibility in their setup. Popular CMS system which can be installed on premises are Wordpress.org, Drupal, Joomla, ModX and others. 
The cloud-based CMS is hosted on the vendor environment. With this approach the CMS software can not be modified for the customer. Good examples of cloud-based CMS are SquareSpace, Wordpress.com, WIX.
Common features.
The core CMS features are, indexing, search and retrieval, format management, revision control, and management.
Features may vary depending on the system application but will typically include:
Popular additional features may include:
Other types of content management systems.
Digital asset management systems are another type of CMS. They manage content with clearly defined author or ownership, such as documents, movies, pictures, phone numbers, and scientific data. Companies also use CMSs to store, control, revise, and publish documentation.
There are also component content management systems (CCMS), which are CMSs that manage content at a modular level rather than as pages or articles. CCMSs are often used in technical communication where many publications reuse the same content.
Best known CMSs.
Based on market share statistics, the most popular content management system is WordPress, used by 40.4% of all websites on the internet (although per definition it is a blog system/website generator, not a full-fledged content management system), followed by Shopify and Joomla.