Sponsored Message Reachable Contacts
The "Reachable Contact" count in your Sponsored Message represents a count of all contacts that Facebook could potentially deliver to within your Audience.
A contact is considered reachable if they meet all of the following criteria:
- User is subscribed to your page
- User did NOT engage with your page in the last 24 hrs
- Users that contacted your page within the last 24 hours will be reachable for free with a Chatblast, but FB will not deliver to these users in a Sponsored Message
- User did NOT engage with the page more than 365 days ago
Note that delivery on a Sponsored Message is generally more restricted because Facebook will deliver up to 1 Sponsored Message per user per day (across all Advertisers). Once a user is delivered a Sponsored Message from any one advertiser, that user will not be served another one from any advertiser that day.