The goal of marketing is to generate valuable results. And since marketing on social media is one of the most inexpensive and efficient ways to market your brand, monitoring whether your marketing activities are effective is highly important. If you market on Twitter, one very useful sign that is easily available to you at the click of a button is Twitter Analytics. It will provide you useful information including users’ location, gender, interests, etc. Facebook, on the other hand, has Facebook Insights where you can see your fans’ demographics, the people who have seen your posts, and the people you were able to reach.
Source: J SEO