Letter writing is the art of composing written messages to convey information, thoughts, or requests to individuals or organizations. It can be formal or informal, depending on the purpose and audience. Formal letters, such as business correspondence or official requests, follow a structured format with a clear introduction, body, and conclusion. Informal letters, like personal notes to friends or family, are more conversational. Letter writing is an essential form of communication, allowing people to express emotions, share information, request assistance, or maintain relationships in both professional and personal contexts.