This is an example of a Sample Page. Unlike a blog post, it stays in one place and can appear in your site navigation, depending on your WordPress theme.
Most people use a page like this to introduce visitors to their website. It could start with a simple introduction, a little about who you are, what you do, and what visitors can expect to find. From there, you can use the Sample Page to share your story, highlight your work, or give visitors a better idea of what your website offers.
…or something like this:
The XYZ Doohickey Company was founded in 1971, and has been providing quality doohickeys to the public ever since. Located in Gotham City, XYZ employs over 2,000 people and does all kinds of awesome things for the Gotham 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!