how to:How to enable a ‘subscribe’ option on Facebook
The ‘subscribe’ feature on facebook can be a great way to get your message out to a larger audience.
Using your personal facebook
Step One: Select the drop down arrow located at the upper right hand corner of your facebook newsfeed.
Step Two: Select “Account settings” from the drop down menu.
Step Three: Select the ‘subscribers’ tab on the left hand side of your screen.
Step Four: Check the “allow subscribers” box.
And you’re done! Now, people who are not your friends on Facebook can subscribe to your page to get updates on your cause.
Here is an alternate how-to guide on allowing the subscription option on your facebook.