1. A personal letter is a type of letter (or informal composition) that usually concerns personal matters (rather than professional concerns) and is sent from one individual to another. It's longer than a dashed-off note or invitation and is often handwritten and sent through the mail.

2. Date, greeting, introduction, body, conclusion, closing nicety, and signature.

3. There, that is: Letter to pen pals, Letters to famous people (fan mail), Love letters,Goodbye letters, Get well soon letters,Condolence letters,

Thank you letters, Celebration letters, and others.

4. The purpose of personal letter is to inform that the receiver that the sender wants to tell an important thing like personal feelings, thoughts, or experiences, which are meant to be read by a specific person.