Facebook category of the page receiving a post, comment, or a post like.
See also: facebook_page.from.category.
Targets in the post.* namespace are populated for Facebook Pages comments and post-level likes (not page-level likes).
- Filter for posts, comments, or post-level likes associated with interactions created by administrators of pages that belong to the given category:
facebook_page.post.from.category in "Product/service"
Target service: Facebook_Page
Always exists: No