This is an example of a page. It's different from a blog post because it will stand alone and appear in the navigation of your website (in most themes). Most people start with an About page, which introduces them to potential website visitors. It might say something like this:

Hello! I'm a postman by day, a tavern singer by weekend, and this is my blog. I live in Niš, I have a great dog, Sima, and I love drinking bamboo.

...or something like:

The company ĆŽLJ was founded in 1991 and has been making quality skljočali since then. Based in Palanka, ĆŽLJ employs over 200 workers and gives a lot to the Palanka community.

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