The document explains the IMAP protocol, which allows users to access and manage emails stored on a mail server while supporting two-way synchronization and folder management. It emphasizes the importance of backing up IMAP emails to protect against server failures, hacking, and accidental deletion, and recommends using the Softaken IMAP Mail Backup Tool for easy backup in various formats. The tool is user-friendly, compatible with multiple Windows versions, and automates the backup process to enhance efficiency and security.