Group Score
===========

   You would normally keep important groups on high levels, but that
scheme is somewhat restrictive.  Don't you wish you could have Gnus
sort the group buffer according to how often you read groups, perhaps?
Within reason?

   This is what "group score" is for.  You can assign a score to each
group.  You can then sort the group buffer based on this score.
Alternatively, you can sort on score and then level.  (Taken together,
the level and the score is called the "rank" of the group.  A group
that is on level 4 and has a score of 1 has a higher rank than a group
on level 5 that has a score of 300.  (The level is the most significant
part and the score is the least significant part.)

   If you want groups you read often to get higher scores than groups
you read seldom you can add the `gnus-summary-bubble-group' function to
the `gnus-summary-exit-hook' hook.  This will result (after sorting) in
a bubbling sort of action.  If you want to see that in action after
each summary exit, you can add `gnus-group-sort-groups-by-rank' or
`gnus-group-sort-groups-by-score' to the same hook, but that will slow
things down somewhat.