Circular letters can be written for various objectives depending upon the requirement of the sender. Personal Objective: The information that is passed on by an individual to circulate his name comes under the personal objective of sending circulars. A donor willing to donate blood may use circular letters to spread the message so that it reaches the people in need. Social Objective: Under this category, the news about a section or group of people of the society is conveyed. Such circular letters are mainly used to inform the whole nation about important information. Business Objective: These are the kind of circulars that are drafted to convey the information regarding a business, rise in demand of a particular product, or at times to advertise any product by the company.