Traffic
You don't need uninvolved adherents. You need to transform window customers into clients, above all, you need to tempt them to stroll through the front entryway. In the virtual world, that implies getting them to visit your site. In the event that you're not previously measuring how much site traffic your Facebook page produces, you should begin now.
When you know the quantity of one of a kind guests Facebook allows you consistently, you can then gauge it against the cost it took to produce your social media content for that crusade period.