Retargeting page engagers
Engagement Retargeting will allow you to capture the audience of anyone who has liked, commented on, or shared your post, visited your Page, sent your Page a Message, or engaged with your Ads. You can then show that particular audience an Ad on Facebook or Instagram.
You will also be able to segment your Engagement into just the people who sent your Page a Message, or just the people who visited your Page (but that may be too small a subset to target).
