Facebook is a massive traffic monster.
As of this writing, it has over 1.3 billion, and that's with a capital B, daily active users. When people are on Facebook, they pretty much stay there and they view page after page of content. In fact, on a month to month basis, as of 2017, Facebook has slightly over 2 billion monthly active users.
Once people log into Facebook, the system basically keeps tight surveillance on them.
Every like, comment, share, as well as page that you liked and even ads that you clicked, will be monitored by Facebook
When it comes to fine laser targeting of demographic groups based on individual user behavior, nothing even comes close to Facebook.
Facebook can make educated guesses as to what your interests are and can then show you advertising that fits those interests.
This is not lightweight targeting, mind you.
You really cannot afford to miss out on Facebook and its marketing potential.
Here's where my advice for you comes in.