Other people use kill files (see Kill Files, but we here at Gnus Towers like scoring better than killing, so we’d rather switch than fight. Scoring and score files processing are more powerful and faster than processing of kill files. Scoring also does something completely different as well, so sit up straight and pay attention!
All articles have a default score (gnus-summary-default-score),
which is 0 by default. This score may be raised or lowered either
interactively or by score files. Articles that have a score lower than
gnus-summary-mark-below are marked as read.
Gnus will read any score files that apply to the current group before generating the summary buffer.
There are several commands in the summary buffer that insert score entries based on the current article. You can, for instance, ask Gnus to lower or increase the score of all articles with a certain subject.
There are two sorts of scoring entries: Permanent and temporary. Temporary score entries are self-expiring entries. Any entries that are temporary and have not been used for, say, a week, will be removed silently to help keep the sizes of the score files down.