The Backup Phrase is very important as it allows you to restore full access to your Jaxx wallets. Please be sure you follow the below steps right after you create your new Jaxx Wallet before you send any funds to it.
1. In your Jaxx Wallet please tap/click the Menu icon at the top right:
2. The MENU should pop from the right. Please choose Tools:
3. In the TOOLS menu, choose Backup Wallet:
4. In the BACKUP WALLET screen choose Backup Wallet again:
5. in the BACKUP WALLET screen follow the on-screen steps to save a copy of your 12-word backup Phrase, confirm that you have the right one and complete the process there.
Now you have a copy of your 12-word Backup Phrase. Please keep it in a safe place where only you can access it.