A. To control protest against taxes imposed by Parliament
The Stamp Act Congress (Oct. 7-25, 1765) was a meeting between representatives from some of the British colonies in North America who gathered with the purpose to plan and control a unified protest against the new taxation the English Parliament had established in the Stamp Act of 1765, and which was would go into effect on November 1, 1765.
The Stamp Act of 1765 imposed a direct tax on the British colonies and plantations in America, requiring to use a specially stamped paper on all paper documents in the colonies, which had to be paid in valid British currency. All paper documents included legal documents, newspapers, magazines, playing cards, etc.
The colonists considered the Act unconstitutional since it was made without the colonial legislature's consent. Their slogan was "No taxation without representation." And, furthermore, the Act intended to revenue taxes to pay for the damages caused by the Seven Years’ War (1756-63), but the colonists held that they had already paid their share of the war expenses and the rest should be paid by London.