You may want to have a backup or a paper copy
How to Download and Backup All Gmail Emails
There are many reasons why you might want to export or download all emails in a Gmail account. Maybe you want to migrate the email account to another email client, or maybe you just want a backup of all your emails in case the worst happens.
We’ll go through a few ways to export or download Gmail emails. You can import them into apps like Outlook or Thunderbird, or online email services like Yahoo or ProtonMail. You can also create a Gmail backup to save to your hard drive or a cloud service like Google Drive, Dropbox, or Microsoft OneDrive.
You can easily download a single email in Gmail as an .eml file or save emails as .pdf files. However, the best way to export Gmail emails in bulk from Google account is to use Google Takeout.