Your Content Management System is an application of sorts called Drupal. Drupal works by keeping your content, or pages, in a database. Pictures and files you upload are put into a "files" folder on the web site.
There are no HTML pages that you can edit directly but instead the pages that make your site are dynamically built from content that's in the database and the files folder.
The front page displays "teasers" from other pages that have been "promoted" to the front page. By default the newest teaser is at the top of the page and up to 10 are displayed.
So, what does all that mean?
Page Teasers Example: Clicking on the teaser title or the more link takes you to the full article.
Note that this concept can be applied to any page view. For example, Energy Ace, Inc. uses the teaser concept for several pages such as their Services page.