A crier is a person who announces or proclaims something, typically by making loud and authoritative declarations in public. The term can also refer to an official appointed to make proclamations or give warnings, such as a town crier who would ring a bell or shout out news or announcements in a village square. In addition, the word "crier" is sometimes used metaphorically to describe someone who advocates for something passionately or loudly, often with the intention of persuading others to take action.