Because WhatsApp is a popular business platform, encryption is essential. You don’t want a bad actor to steal your important business messages. WhatsApp users could encrypt their chat backups a few years ago. Encrypted backups of your chats can be saved to Google Drive or iCloud.
You will be prompted to enter a password when you enable this feature. Either that or you’ll encrypt it with a 64-digit key. So, if you want to access your encrypted chats, you must re-enter your password.