According to Aaron Agius (Contributor), social media is an effective marketing medium. There are many marketers who use Facebook followers, retweets, etc. to monitor their performance, but there are some other metrics like brand search volume, lead growth, brand sentiment, inbound links, and klout score. Social share provides very little information about the overall effectiveness of your campaign because: Many social shares come from bots.
• Social shares many not come from your target customers.
• Social shares can be from people that are speaking negatively about your brand.
Read more at: http://www.entrepreneur.com/article/244669