This is an example page. It is different from a blog post because it will stay in that place and will show up in your site navigation (in most themes). Most people start with an about page that introduces them to potential site visitors. It might say something like this:
Hi! I'm a Bike Messenger by day, aspiring actor by night, and this is my website. I live in Los Angeles, I have a big dog named Jack, and I like piña coladas. (And getting caught in the rain.)
...or something like that:
The Doohickey XYZ Company was founded in 1971, and has been providing quality stuff to the public ever since. Located in Gotham City, XYZ employs over 2,000 people and makes all kinds of awesome stuff for the Gotham community.
As a new WordPress user, you must go to your Dashboard to delete this page, and create new pages for your content. Have fun!