Magento 2 consists of three components:  Module: It is a directory with files in the forms of blocks, helpers, controllers, and models that are written in PHP and XML. It is a logical group that gives Magento applications crucial business functionalities.  Themes: The visual component of Magento applications is made up of templates, layouts, pictures, and styles. Be aware that Magento offers themes as add-on packages.  Language Packages: These are another independent Magento component. The entire dictionary is typically contained in a single directory in language packages.