This is a sample page. It is different from a blog because it stays in one place and appears in your site navigation (in most themes). Most people start with an About Us page to introduce themselves to potential visitors. It could look something like this:
Hi! By day, I work as a bike messenger; by night, I make the best drinks in a cozy bar, and this is my website. I live in Trenčín, have a hamster named Igor, and sometimes go on dates with my city (not going to the bar, but just walking around, for example).
...or something like this:
XYZ Doohickey Company was established in 1971 and has been providing high-quality services to the public ever since. Located in Gotham City, XYZ employs more than 2,000 people and does all sorts of amazing things for the Gotham community.
As a new WordPress user, you can go to your dashboard, delete this page, and create new pages for your content. Have fun!