Mar 1st, 2013
"Associate menus, views, blocks, etc. with different contexts to structure your site."
This lets you define sections of your sites. Each section is called a context. Each context can be defined in many ways. A context may combine anything from a content type being viewed, a view being shown, a certain role is viewing the site, and much more. You can then do all sorts of things based on the context; things like theme switching, enabling and disabling blocks, and moving blocks around to different regions.