This is a sample page. It differs from posts in that it remains in the same place and (in most themes) is displayed in the site navigation. Most people start with an imprint, a privacy policy, or an “About us” page to introduce themselves to potential visitors to the website. For example, it might say:

Hello! During the day I work as a bicycle courier, at night I am an aspiring actor, and this here is my website. I live in Berlin, have a big dog named Jack, like piña coladas, but I like being left standing in the rain (without an umbrella) less.

… or something like:

Company XYZ was founded in 1971 and has been providing the public with high-quality products ever since. At its location in a small major city, the company employs more than 2,000 people and supports the city’s residents 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 website. Have fun!