This is an example page. It's different from a blog post because it will stay in one place and will be included 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! By day I work as a bicycle courier, by night I'm an aspiring actor and this is my website. I live in Berlin, have a big dog called Jack, I like Piña Coladas, but less so being left out in the rain (without an umbrella).
… or something like:
The XYZ company was founded in 1971 and has been supplying the public with high-quality products ever since. Located in a small city, the company employs over 2,000 people and supports the city's residents in many ways.
As a new WordPress user, you should Your dashboard call to delete this page and create new pages and posts for your website. Have fun!