This is a Web Part Page
Use this page type to display dynamic content, such as views of lists or libraries from within the site. This page is composed of web parts -- for example this content is displayed by a Content Editor web part.
The Announcements web part below displays items from the Announcements list. All lists and libraries can be displayed as web parts in this way.
The Image Web Part displays a picture from the Picture Library -- yet another way to display content.