Though companies are spending more money on social media marketing, many are still trying to figure out best-in-class strategies and measurements.

Here's a look at the current state of social media marketing.

US B2B marketers alone are projected to spend more than $100 billion on social media advertising by 2017, according to the following Morrison Foerster infographic.

However, 60% of social media practitioners cite "measuring ROI" as one of the top 3  challenging aspects of their social media campaigns, states Morrison Foerster.