This is an example page. It is different from a blog post because it will remain in one place and will appear in your site navigation (in most themes). Most people start with an "About" page that introduces them to potential visitors to the site. You could say something like this:
Welcome! I'm a waiter by day, an aspiring actor by night and this is my website. I live in Mairena del Alcor, I have a dog called Firulais and I like rebujito. (And long afternoons with coffee).
...or something like that:
The company "Mariscos Recio" was founded by Antonio Recio Mata. It started as a small company that supplied seafood to hotels and restaurants, but little by little it has been transformed into a great empire. Mariscos Recio, the sea at the best price.
As a new WordPress user, you should go to your desktop to delete this page and create new pages for your content. Have fun!