For me, a understandable, short description should be
"Only works with more tabs selected. Allows to paste contents, selected on the visible tab, to the same cell(s) on other selected tabs"
You are talking about https://help.libreoffice.org/Calc/Fill or https://helponline.libreoffice.org/5.4/en-US/text/scalc/01/02140500.html?&DbPAR=CALC&System=WIN
Especially the latter is quite informative, though not easy to find in the new help. Your sentence could be a bit more verbose like "The function works only..." and "This function allows to...". And yes, this info is missing in the current online help.
However, it's up to the docu team to take this ticket into new state.
Gabor Kelemen committed a patch related to this issue.
It has been pushed to "master":
tdf#113249 Update Fill Sheets page
A polite ping to Gabor Kelemen: is this bug fixed? if so, could you
please close it as RESOLVED FIXED ? Thanks
wonderful explanation. Thanks Gabor.
Small suggestion maybe: replace text
"In contrast to copying an area to the clipboard, you can .."
"Additional to just copying, you can also .."