Moderation is the process of eliminating or lessening extremes. It is used to ensure normality throughout the medium on which it is being conducted. Common uses of moderation include:

• Ensuring consistency and accuracy in the marking of student assessments.
• A moderator may remove unsuitable contributions from the website, forum or IRC channel they represent in accordance with their moderation system.
• A more proactive nuance is found in the Methodist church's use of the term for the heads of its conferences.
• A neutron moderator is used to slow down neutrons in a nuclear reactor.
• A way of life emphasizing perfect amounts of everything, not indulging in too much of one thing, hence moderation.