[dropcap]W[/dropcap]ordPress is a free and open-source tool and a content management system (CMS) based on PHP and MySQL. WordPress was used by more than 25% of the top 10 million websites as of June 2015.
WordPress is the most popular blogging system in use on the Web,at more than 60 million websites.It was first released on May 27, 2003, by its founders, Matt Mullenweg & Mike Little.

What is Wordpress