This is an example page. It is different from a blog post because it will stay in one place and will show up in your site navigation (in most themes). Most people start with an About page that introduces them to potential website visitors. For example, it could say:

Hello!!! I'm a bike messenger by day, aspiring actor by night, and this is my website. I live in Los Angeles, have an awesome dog named Jack, and I love piña coladas (and getting caught in the rain.)

...or something like this:

Founded in 1971, XYZ Dingenot has been providing quality Dingenots to the public ever since. Located in Gotham City, XYZ employs over 2,000 people and does all kinds of amazing things for the Gotham community.

As a new WordPress user, you should go to your control panel to delete this page and create new pages for your content. Have fun with it!