What are some differences between a personal letter and a business letter?

A personal letter typically has a casual tone and may include personal anecdotes, emotions, and informal language, reflecting a close relationship between the writer and recipient. In contrast, a business letter is more formal and structured, focusing on professional communication, clear objectives, and often adhering to specific formatting guidelines. Additionally, personal letters may not require a subject line or formal salutation, while business letters usually include these elements to convey professionalism and clarity.