This is an example page. Pages are different from blog posts because not only do they always live in one place, but they also appear in the site menu (in most themes). Most users start with an About page that introduces them to site visitors. For example, a page like this might contain text:
Hi! By day I'm a bike courier, by night I try my hand at acting, and this is my website. I live in Krakow, I have a wonderful dog named Reks, and I like piña coladas (and walks when it's raining).
…or something like this:
XYZ Doohickey was founded in 1971 and has been providing quality gadgets to the community ever since. Located in Gotham City, XYZ employs over 2,000 people and does amazing things for the Gotham community.
As a new WordPress user, you should go to your dashboard to delete this page and create a new one with your own content. Have fun!