It comes in two flavors. wordpress.org
is the home of the WordPress publishing platform
itself, where you can download installation files,
search the forums for help, and learn about different
plug-ins that extend the system’s functionality.
It is a CMS that is heavily biased toward blogs.
WordPress.com, by contrast, is the hostedversion of the software. It operates along the
lines of Blogger—users create an online account, name their blog, and start publishing
almost immediately with a very intuitive interface and dozens of design templates to
choose from, which can be changed instantly. It contains almost all of the tools of the traditional WordPress software, but without the need for a local installation.
While WordPress.com offers writers tremendous flexibility in publishing options, the system itself can be harder to customize than Blogger. The template is fragmented into categories like CSS, Sidebar Widgets, Custom Image Header, and more, rather than being
condensed into a flat template.
For businesses looking to get up and running quickly with a locally installed blogging solution, WordPress is the ideal candidate. For those looking for a richer, more extensible CMS
with far greater functionality.