Facebook is one of the 4 most popular social media sites to use to both connect and create a network. It is however controlled by algorithms that are set up by Facebook themselves, so is not 100% controllable. However, if used properly you can reach an audience.
What you post on Facebook and how you post on Facebook is the trick. Your Opt In pages are key here to direct and link any of your Facebook Followers into your Customer Base on the site.