An example page. Pages are different from blog posts because not only are they always in one place, but they also appear in the menu of the site (in most themes). Most users start with a page with information about themselves, which will introduce them before visitors to the website. Such a page may contain, for example, such content:

Hello! By day, I'm a bike courier, at night I'm trying my best at acting, and this is my website. I live in Krakow, I have a wonderful dog named Rex and I like piña colada (and walks when it rains).

...or something like this:

XYZ Doohickey was founded in 1971 and has since provided the public with good quality gadgets. Located in Gotham City XYZ employs over 2,000 people and does amazing things for the Gotham community.

As a new WordPress user, you should go to Your cockpit to remove this page and create new with its own content. Have fun!