This is a small service for poorly connected users who can access the web only in a limited way. You just send an email to "email@example.com" and get back the corresponding manual page in a nice HTML format.
So if you want help on the branch command, just firstname.lastname@example.org.
Your email address is not stored, no logs are kept.
But you do not have it in a nicely easy to read HTML format. This is for my brother, he works for the nuclear industry where the web is a white listed list of sites. He cannot even access http://gitmanual.org
In a not so sensitive area (bank, insurance), I know a couple of people without real web access.