What is editorial photography?
"Editorial" refers to the market where the images will be used -- primarily books, magazines, and newspapers -- and, to a lesser extent, to the style of photography that appears in these venues. We use the term editorial to distinguish it from other markets like corporate, advertising, general commercial, or fine art. Most editorial outlets offer a fair amount of creative freedom, but also extremely low budgets compared to other venues.
(sourced from http://www.editorialphoto.com/resources/faq.asp#anchor1 )
another article i read, also explains about how editorial photographs tell the story of the content of the main story through the images themselves, if successful.
