This question already has an answer here:
On child meta sites, new users (those who don't have a badge yet) see the message "Take the Tour and earn your first badge" in their profile page. The message is the same as on the normal Q&A sites.
However, on meta pages, the tour is linked to their parent site and it's not possible to obtain the informed badge on sub meta sites, so the message is useless on meta. For my user, I saw this message on http://meta.unix.stackexchange.com and http://meta.superuser.com/