WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. Word Press is arguably the easiest and also the most popular CMS in the market today holding the unique distinction of powering more than 60 million websites (both large and small) across the globe. WordPress had a modest beginning in 2003 with a limited number of users, when it was launched by its founders, Matt Mullenweg and Mike Little with a single bit of code to enhance the typography of everyday writing. The powerful yet simple CMS has come a long way since, becoming the largest self-hosted blogging tool in the world, used by millions of sites and viewed by millions of users on daily basis.
WordPress.com vs. WordPress.Org
There are two basically two types of WordPress platforms available in the market: WordPress.com and WordPress.org. For WordPress.com, your site is hosted by WordPress and you will be assigned a subdomain website (e.g. yourname.wordpress.com). It is free (website hosting will cost you cipher) which happens to be its primary benefits. On the fillip side, the number of features available to you are limited. For example, WordPress.com does not support plugins, which is a major drawback as plugins are one of the most important features of WordPress). In addition, WordPress.com is "ad-supported". This means that ads will keep popping at regular intervals on your website.