This is an example page. It differs from posts because it always stays in the same place and is displayed in the navigation bar (for most themes). Most people start with an imprint or an “About us” page with an introduction for potential visitors to the website. It could be there, for example:
Hello! During the day I work as a bicycle courier, at night I am an aspiring actor and this is my website. I live in Berlin, I have a big dog named Jack, like to be left standing in the rain, but less (without umbrella) than Piña Coladas.
or something like that:
Our company XYZ was founded in 1971 and has produced a lot of high quality ABCs for the public ever since. Based in Gotham City, XYZ now has over 2,000 employees and continues to develop great things for the entire Gotham community.
As a new WordPress user, you should use the dashboard to delete this page and create a new page with your own content instead. Have fun!