The included page content of your website will depend upon which type of site you selected.
However, you can expand or reduce that content as you desire. You can also add content pages, up to a total of 99 pages on the website.
Though you can add more than 99 pages, the structure of the site cannot reliably support that many pages. A lot of testing supports the fact that the site will likely become unstable with more than 99 total pages. Consider 99 pages the maximum number of content you can add to your site.