Private User, yes I know and I asked to put more/better information on that page.
It does not help that all users are directed to their own gedcom page when they try to look a gedcom document from another user. That makes it a bit harder to help others users.
There is some additional info on https://www.geni.com/projects/Connecting-to-the-Big-Tree/17983 and https://www.geni.com/projects/What-to-do-after-you-have-uploaded-a-...
The users that import a GEDCOM are mostly new to Geni so I think that page would be a good starting point to give some general information on Geni and preparing for making a GEDCOM that can be used with minimal problems by Geni.
With that in mind I think the page is also missing info on the use of different languages,a link to the naming conventions (like not using uppercase names and having at least estimated dates (so default privacy will be correct).
A description of the whole import process, the idea of the Geni World Tree, privacy and the difficulties for a basic user in finding a matching profile would also be most welcome.
I think it would also help to put some info (or a link) there with some info on why merging will create tree and data conflicts and how and by whome these can be handled on Geni.
A link to https://wiki.geni.com/index.php/Curators and https://www.geni.com/discussions/216411 might also help.