Use Facebook’s extensive user base of over two billion potential customers to build a list of subscribers for your email marketing list. You can easily do this by adding a MailChimp sign-up form to your Facebook Business page or Fan page.
Login to your MailChimp Dashboard and click ‘Audience’
Facebook has a powerful and free analytics tool – Facebook Insights – that allows you to easily measure the performance of your Business Page. Insights tracks likes, page views, reach and more. Regardless of what your goals are on Facebook: building brand awareness, communicating with customers or getting followers to take an action, Facebook Analytics will help you understand who your most engaged audience is and how they’re interacting with your page.