This is an example page. It's different from a blog post because it will stay in the same place and will appear in browsing your site (in most themes). Most people start with a page « About » presenting them to people visiting the site. It might look like something like this:

Hello! I am a mechanic who aspires to become an actor, and this is my website. I live in Bordeaux, I have a great dog named Russell, and I like vodka (as well as being surprised by the sudden rain during long walks on the beach at sunset).

...or something like that:

The company 123 Machin Truc was founded in 1971, and has ceased to offer the public high-quality materials since then. Located in Saint-Remy-en-Bouzemont-Saint-Genest-et-Isson, 123 Machin Truc employs 2,000 people, and manufactures all kinds of super bidules for the Bouzemont community.

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