New from me on Voce Nation:

That means that, assuming you already aren’t, the metrics you’re tracking need to evolve. “Engagement” may have been good three years or so ago, but considering social networks are becoming overloaded and engagement is falling, there needs to be a better way to track program success. Ideally that means moving to something a bit more substantive like on-domain traffic from social or, even better, conversions.

Source: Report: Social Engagement Falling as Volume Rises « Voce Communications