Once your Gift Card is purchased, it will appear in your Gift Card 'Vault'. This is located at the top of the Money tab. There are two sections,'My cards' which contains your active Gift Cards, and 'Archive' which contains your used and expired gift cards.
In the 'My cards' section, if you select a Card, it will take you to the information page, where you can use the link to the merchant store in order to check remaining balance along with a how to use guide and conditions.
If your Gift Card can be used in-store, you will also see a bar code that you can use to redeem it physically.
The same information is also available to you in an email that will be sent to your registered Woolsocks email or in the email of the person you are buying a Gift Card for, once they have claimed it through the link you share.