A REALLY NEW feature in in the Facebook Ad Manager audiences is to be able to build audiences from people who interact with your Facebook page.
The ability to create audiences from video engagement has been available fora while now. Along with the ability to build audiences from people who visit your website, the options are really interesting.
I’m currently using an audience of people who have “engaged with” my Facebook page as a front line promotion. Rather than just promoting to people who “liked” your page, now you can target the people who actually interact! How cool!
I also built a lookalike audience of this group and have found that clicks and post engagements are really cheap!