WordPress is an online, open source website creation tool written in PHP. But in non-geek speak, it's probably the most powerful blogging and website content management system (or CMS) in existence today.
What You Can Use WordPress For?
WordPress started as just a blogging system, but has evolved to be used as full content management system and so much more through the thousands of plugins and widgets and themes, WordPress is limited only by your imagination. (And tech chops.)
With WordPress, you can create any type of website you want: a personal blog or website, a photoblog, a business website, a professional portfolio, a government website, a magazine or news website, an online community, even a network of websites. You can make your website beautiful with themes, and extend it with plugins. You can even build your very own application.