Describe the current group (gnus-group-describe-group). If given
a prefix, force Gnus to re-read the description from the server.
Describe all groups (gnus-group-describe-all-groups). If given a
prefix, force Gnus to re-read the description file from the server.
Display current Gnus version numbers (gnus-version).
Give a very short help message (gnus-group-describe-briefly).
Go to the Gnus info node (gnus-info-find-node).