This is an example page. It differs from posts in that it always stays in the same place and (on most themes) appears in the site navigation. Most start with an imprint, privacy policy, or an “About Us” page to introduce themselves to potential site visitors. For example, there could be:
Hi! By day I work as a bike messenger, by night I’m an aspiring actor and this is my website. I live in Berlin, have a big dog named Jack, like piña coladas but not so much being left out in the rain (without an umbrella).
…or something like this:
XYZ Company was founded in 1971 and has been providing the public with high quality products ever since. Located in a small city, the company employs over 2,000 people and supports the city dwellers in many ways.
As a new WordPress user, you should go to your dashboard to delete this page and create new pages and posts for your site. Have fun!