When creating a Facebook post, you must first select a Character with a Facebook page and then select whether the post is to the Character's Wall or to a Page created by the Character.
Having posted to the Wall or a Page, any Facebook Triggers must match and listen for comments in the same place!
If you plan to post images or videos to Facebook, use the controls before the text area (B) as this will be the most reliable way to ensure that the asset is embedded in the post.
Tumblr is a popular blogging platform. A Character with an authenticated Tumblr account can post content to a Tumblr blog.