When you archive, you get three key benefits.
When you archive, you get three key benefits: you keep a historical record, you save disk space, and you cut down on visual clutter.
Effective record keeping When you archive messages instead of deleting them, you'll have records of your work that can help you remember the details of events, projects, and processes. If you're the kind of person who never throws anything away, archiving is your dream.
Save disk space Because archiving makes use of compression, archived items use less storage space.
Cut down on visual clutter Archiving removes items from your mailbox and puts them in the archive file. Now that you can more easily see the messages you need, you can work with them more effectively.