The tending of what may be said or shown in a shared space. Moderation is a judgment exercised on behalf of others.
Latin moderatio (a controlling, a keeping within measure), from moderari (to regulate), from modus (measure); the tending of what may be said or shown in a shared space.
Judgment exercised on behalf of everyone sharing a space, not just the one exercising it — tending rather than owning what gets said.