WordPress is a free and open source blog software based on PHP and MySQL. It's include a plugin architecture (for extensions) and a template engine (the face of your blog). More than 60 million websites runs with WordPress, that’s about 20% off all top 10 million websites worldwide. You see WordPress is a really nice system with which you can start your online blog.
Sequence of events
Visit WordPress
And follow the image introductions.
An explanation is on the end of the image.