Thanks to this feature, you can share your store with another account registered in BeezUP (only if you are the owner of this store).
In the page "My account > My stores", click on the share button of the store :
It leads you to a page where you will see all shares you already made, and where you can add a new one :
1. Input the email address of the account
2. Click on "add"
Caution: you can share this store only with accounts registered on BeezUP.