Here is a good infographic made by Pardot on how Social Media companies performed in 2012.

Social Media is all the craze right now especially for businesses. Never before did we have a platform where businesses can engage with the customers directly. A great way for customers to voice concerns and praise on their favorite product or company. As we engage everyday on social media networks, we ask ourselves…”what is the best platform?”…”where should we focus our social media marketing efforts?”.

The inforgraphic below is a great way to show how each major social network performed last year.

NOTE: ROI estimates are based on audience, growth rate, and audience composition, and are calculated to convey potential return for B2B marketers.

Here is a link to the original post at Pardot.com