This is an example page. It's different from an article because it's on the same site and appears in your site's navigation (mostly themes). The normal is to start with a page "About me"/"About us", which presents the site to visitors. It could be anything like this:
Hello! I deliver during the day, but I study to be an actor at night. This is my website. I live in Lisbon, I have a dog named Belarmino and I like caipirinhas (and to see the grass growing).
… or something like this:
Gambozinos XPTO was founded in 1971 and has since supplied gambuzinos of the highest quality to its customers. Located in Gotham, Gambozinos XPTO employs more than 2,000 employees, and is one of the pillars 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 a good time!