Understanding how Social Media helps your online presence

Investing in social media is a topic we often discuss and sometimes it is hard to determine which is the best medium to implement first. CMO.com recently released "The Social Media Landscape" which gives an illustrated guide to some of the top social media sites out there. Take a look at this chart and determine which sites are best for you:

Every company is different! Therefore finding the right medium to invest your time in is important to making sure you have a social media presence out there. Which sites do you find work best for your firm?