I do like a simple chart. This from Danyl Bosomworth on Smart Insights pretty much does in one page what others take a whole deck to explain.
The caption for this chart is; "..It’s almost a year ago since we created our blueprint for content marketing infographic – and with so much conversation now around the converging of digital and ‘off-line’ media, the proliferation of mobile and the increasing popularity of marketers talking about paid, owned and earned media we wanted to update our blueprint for 2013.."