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:
…or something like this:
This company did great things and now I am very happy!
– Happy Customer #1
If I didn’t hire this company, I would be out of business by now.
– Happy Customer #2
As a new WordPress user, you should go delete this page and create new pages for your content. Have fun!