WordPress is a free and open-source content management system (CMS) based on PHP & MySQL. Features include a plugin architecture and a template system. It is most associated with blogging but supports other types of web content including more traditional mailing lists and forums, media galleries, and online stores

"WordPress is a factory that makes webpages" is a core analogy designed to clarify what WordPress is & does. It stores your content that allows you to create & publish webpages only requiring a domain and a hosting site to work.