A new buffer with a list of available groups will appear. This buffer
will use the
gnus-browse-mode. This buffer looks a bit (well,
a lot) like a normal group buffer.
Here's a list of keystrokes available in the browse mode:
gnus-browse-unsubscribe-current-group). You can affect the way the new group is entered into the Group buffer using the variable
gnus-browse-subscribe-newsgroup-method. See see Subscription Methods for available options.
gnus-browse-delete-group). If given a prefix, this function will actually delete all the articles in the group, and forcibly remove the group itself from the face of the Earth. Use a prefix only if you are absolutely sure of what you are doing.