Meta Business Help Centre
Context button overview
Facebook's context button is designed to provide more background and information on the publishers and links that appear in Feed so that people can decide for themselves what to read, trust and share.
The context button appears alongside links shared in Feed. When clicked, the button opens a card showing the publisher's Wikipedia entry, related links, information about how many times the link has been shared on Facebook and where it has been shared, if available.
If we cannot find a Wikipedia entry, then we will not show the Wikipedia module.