OK, so it's the wiki or this

Just got an email telling me how to add some contact information stuck
in a spreadsheet on a sharepoint...

"The link below (that [some guy] sent) contains a content transmission
ID (basically giving you the view that [he] had). If you hit the link
below (also my personal view with a CTID):
http://blah-dee-blah
and then click on "[blah-dee-blah] Documents" (on the left pane) and
then click "Contacts"
You should be graced with your own personal view where you should be
able to make a checkout on the file, save it, and check it back in.
Hope this helps."

Yeah. Or I could edit a wiki page.