Google Drive is an online storage system which has all kinds of benefits attached to it.
If you've ever used DropBox you'll know how handy it is syncing your information across the cloud. Google Drive is similar in that respect but also integrates with docs, mail, maps and tons of other stuff. It's 5Gb free as standard and has very decent rates if you wish to pay for extra space.
Here's a quick promo video about it:
You can read about this new product at the Google blog or simply sign up to get yours.
If you haven't used Cloud based stuff before (You chances are you will have even if you don't know it) this is definitely worth a bash.
Usual Google owns your soul and sells it to the devil terms and conditions apply!