This is a sample page. It is different from an article because it stays in the same place and appears in your site’s navigation (in most themes). It is normal to start with an “About me”/”About us” page, which introduces the site to visitors. It could be anything of this sort:

Hello! I deliver during the day, but study to be an actor at night. This is my website. I live in Lisbon, have a dog named Belarmino, and enjoy caipirinhas (and watching the grass grow).

… or something like that:

Gambozinos XPTO was founded in 1971 and has been providing the highest quality gambuzinos to its customers ever since. Located in Gotham, Gambozinos XPTO employs over 2,000 employees, and is a pillar of the community.

As a new WordPress user, you should go to your dashboard to delete this page and create new pages of your own content. Have fun!