Main content area
Each page contains multiple elements. Many of these are common to most or all pages, such as the sidebar and Page Title.
The main content area of a page is the part of the page which that is unique to that page (the part that is not shared with other pages).
The sidebar is not part of the main content area because its contents are typically shared among other pages. A typical page might include some text and photos and callout objects.
Keywords: main, content, area, page