This is a sample page. It is different from a blog article because it stays in one place and appears in the main navigation of your website (in most topics). Most people start with a page about me that introduces them to potential visitors to the site. It may be something like:

Hi! By day I'm a messenger on my bike, a hopeful actor at night and this is my website. I live in Los Angeles, I have a great dog named Jack and I like Piña Colada.

... or something like this:

XYZ Doohickey was founded in 1971 and has since provided the public with quality "great nothing". Located in Gotham City, XYZ, it employs more than 2,000 people and does all kinds of amazing things for the village of Gotham.

As a new WordPress user, you should go to administration, deletethis page and create new pages for your site. Have fun!