This is an example page. It's different from a blog post because it will stay in one place and will show up in your site navigation (in most themes). Most people start with an About page that introduces them to potential site visitors. It might say something like this:

Hi there! I'm a mechanic who aspires to become an actor, and this is my site. I live in Bordeaux, I have a great dog named Russell, and I like vodka (as well as being caught by surprise by sudden rain during long walks on the beach at sunset).

…or something like this:

The 123 Thingamajig Company was founded in 1971, and has been offering the public quality thingamajigs ever since. Located in Saint-Remy-en-Bouzemont-Saint-Genest-et-Isson, 123 Thingamajig Company employs 2,000 people, and makes all kinds of awesome gadgets for the Bouzemont community.

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