The Facebook card (Analytics category) holds the keys for Facebook's page and developer features. Its fields are displayed with their internal names: facebook_pageid (your Facebook Page ID), facebook_themecolor (a colour code), facebook_appid and facebook_appsecret (from a Facebook Developers app).

When a Page ID or App ID is saved, Sprwt loads the Facebook SDK on your website; with a Page ID it also shows the Messenger customer chat bubble on customer-facing pages, using the theme colour you set. The App ID is additionally published as the fb:app_id meta tag on every page and is what the Facebook login callback uses. The card is Active once the Page ID is saved.