For example, my Facebook post has been linked in a Quora question or a WordPress blog and also visited several times from there. Can I somehow learn about this?
If you click the down arrow in the top right corner of the post, one of the options is an embed link. This will give you a URL of the form, https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2Fuser.name%2Fposts%2F1234567890123. Presumably, anyone linking your post will need to use this link or one very similar. You might try searching Google for this link or even just the post number.