WordPress is an online, open source website creation tool written in PHP. It’s probably the easiest and most powerful blogging and website content management system (CMS) in existence today.
WHY IS WORDPRESS SO POPULAR?
(1): It is super easy to use
(2): It creates your pages in a way that is easy for search engines to read, helping you rank higher on Google.
(3): It is incredibly flexible and packed with features
It is FREE.