You are currently viewing a sample page that was created automatically during the installation of WordPress. Pages are different from posts, especially because they contain some static text and are displayed on the same site (for most templates it is a navigation menu). People usually first create basic information pages where they introduce themselves to site visitors and introduce them to their intentions. It can be eg. something in the following style (personal website):
Welcome! My name is Paul and I live in the countryside. I work as a programmer and at night we translate WordPress into Czech. And this is my website, where sometimes you learn not only about programming, but also about my family and travel. We like to go on trips, regardless of the weather, because I like to sing in the rain…
… or something similar (company website):
XYZ was founded in 1991 and has been engaged in the production of high-quality cider since the beginning. We focus on processing fruit from small growers and our products do not contain any other chemical additives. The company is based in Liberec and employs more than 200 qualified people.
If you're just starting with WordPress, you should first log in to the administration and delete (or edit) this page. And nothing can even prevent you from creating additional content in the form of new pages and posts. We hope you will be pleased with the administration of the site in the WordPress editorial system!