Page views, time spent, clicks, uniques, and shares: does anyone really know how best to measure an online audience?

[youtube http://www.youtube.com/watch?v=jS9SXC09UHY&w=600&h=315]

It feels like people have been saying this for years, although it probably hasn't really been that long: essentially, the media game is changing. Here's an article from today via The Atlantic, noting that outbound links off of Facebook went from 62 million (2012) to 161 million (2013); clea…