This is an example page. It is different from posts because it will stay in one place and will be shown in your site's navigation (in most themes). Most people start with an About page that introduces them to potential site visitors. It might say something like this:
Hello! During the day, I work as a bicycle courier, and at night I'm an aspiring actor, and this is my website. I live in Berlin, have a big dog named Jack, and I like Piña Coladas, though I'm less keen on being left in the rain (without an umbrella).
… or something like:
Company XYZ was founded in 1971 and has since been supplying the public with high-quality products. At its location in a small city, the firm employs over 2,000 people and supports the city's residents in many ways.
As a new WordPress user, you should Your dashboard to call to delete this page and create new pages and posts for your website. Have fun!