A great deal of what goes on screens is web pages: a dashboard, an intranet page, a live report, a status board. But a web page is built for a person at a browser, not a display on a wall, and the page you want is often behind a login or on your own network.
These pages cover how Screenly bridges that gap: running your own code on a page to make it fit, giving a screen a way to reach pages that are not public, and passing each screen its own context so one page can serve many.