A page has already been created for you to add a short introduction, biography, or c.v. By default, it is set up as the homepage of your site. You can change this in Appearance > Customize > Homepage Settings.
By default, the About page is set up with a “shortcode” that simply displays the bio and portrait photo you uploaded during registration. If you wish to edit this placeholder content, simply delete the shortcode
"bio_shortcode" along with the [ ] brackets, and enter new text or images.
See also: Adding/Editing Page & Post Content