What was the purpose of declation of independence?

The Declaration of Independence, adopted on July 4, 1776, served to formally announce the American colonies' separation from British rule. Its primary purpose was to articulate the colonies' grievances against King George III and to justify their quest for self-governance based on Enlightenment ideals of individual rights and liberty. By declaring independence, the document aimed to unify the colonies and garner support for their revolutionary cause both domestically and internationally.