Instagram is the most visual of the static social media sites (vs. Youtube for example) and is the perfect platform for great visuals and short videos to use to both connect and create a network.
It is however owned and controlled by algorithms that are set up by Facebook themselves, so is not 100% controllable. However, if used properly you can reach an audience.
Your posts on Facebook can be shared with you Instagram account and visa versa, so it is key that you use different material on different platforms and your written content is varied.
Your Opt In pages are key here to direct and link any of your Instagram Followers into your Customer Base on the site.