Social media is inherently social, public, and mostly free. And the smartest people in the industry are also inherently social, public, and give away a lot of amazing insight and information for free. Everything you need to know about social media is already available for you, filtered by millions of readers, and optimized from many years of other people’s trial and error. And everyone you need to know to help you learn and apply this knowledge is already willing to engage with you, and help you learn it.