I recently spent about half an hour trying to determine why I wasn't getting reputation for an upvoted question I asked on a child meta site.
Let me give a bit of background.
I posted a question to a child meta site and it got an upvote.
I was puzzled when I didn't get any reputation for this, so I investigated.
Based on this, I (incorrectly) assumed that the behaviour of the child meta site should be in no way different from the behaviour of the child main site. (Since they shared the same help pages.)
Because I was interested in reputation, I went to the What is reputation? How do I earn (and lose) it? help page.
That page didn't mention anything about reputation on the meta site behaving differently.
So, I posted a question about why I hadn't received any reputation, and got the answer that votes do not affect reputation on child meta sites.
I was also referred to the What is "meta"? How does it work? help page.
It hadn't even occurred to me that there would be a separate section within the child main site Help Center that discussed everything about its meta site—and so, I hadn't thought to search for "meta."
Therefore, I propose a couple of changes to how the help pages work that could make this more easily discovered.
If there is something specific to a child meta site, it should be cross referenced within the child main site's relevant help page.
For example, add the following to the bottom of the What is reputation? How do I earn (and lose) it? help page:
Note that the meta site treats this differently.
For more information, see What is "meta"? How does it work?
When viewing a child meta site and clicking the link to its Help, do not redirect to its main site's Help Center. Instead, show the What is "meta"? How does it work? help page, along with some text and a link at the top along the lines of:
For help in general, see the main site Help Center.
Both of these changes would be ideal, but even just one of them (the easiest to implement is the second) would have prevented a lot of confusion on my part.