1. With Free Native Facebook API SNAP can post to Facebook Pages and/or Facebook Groups. You must obtain explicit approvals from Facebook for posting to Pages and Groups.

2. With NextScripts Premium API SNAP can post to Facebook Profiles, Facebook Pages and Facebook Groups.

You must be an owner of profile to post there.
You must be an admin of the page to post there as “Page Name”. If you are not an admin posts will go to the “Community” section.
You must be at least a member of the public, closed or secret group group to post there. All group rules will apply. If group itself or your account is required pre-moderation, autoposts will be sent to moderation query.