Business correspondence plays an important role in maintaining relationships between businesses and customers. While modern communication methods exist, traditional business letters still have value due to their ability to sustain long-term relationships, convey complex information, serve as records, and reach broad audiences cost-effectively. Business letters are written for various purposes including to inform, congratulate, inquire, order, request, collect dues, complain, make adjustments, sell products/services, and apply for jobs. The standard structure of a business letter includes a heading, date, inside address, salutation, message, complimentary close, signature block, and sometimes additional identifying elements.