This is an example-page. It differs from posts because it always stays in the same place and (for most themes) is shown in the website navigation. Most start with an imprint, the data protection declaration or an “About us” page to introduce themselves to potential visitors to the website. For example it could say:
Hello! I work as a courier during the day, and at night I do acting, and that’s my website. I live in a big city, have a great dog and I like drinks with an umbrella (but not standing in the rain without an umbrella).
… or something like this:
XYZ was founded in 1971 and has been providing the public with high quality products ever since. At its location in a small city, the company employs over 2,000 people and supports city residents in many ways.
As a new WordPress user, you should go to your dashboardto delete this page and create new pages for your content. Have fun!