Go to Sell Giftcard tab and first click on gifting module customize.
Customize Gifting module as per your need and save the changes.
Now click on greeting experience customize
Customize greeting experience as per your need and save the changes.
Enter your gift card product details like title, description, expiry period.
Change giftcard image or select from default ones.
Now you can add variant/ denomination as many you want.
Now you are ready to go!
you have successfully setup the sell giftcard.