The Free Shipping Threshold sets the amount at which customers will receive free shipping from your store.
Here's an interactive tutorial for the visual learners
You can grab the country code from the following URL - https://www.nationsonline.org/oneworld/country_code_list.htm
Domestic Country Code – Input your country code here. Ex: US for the United States. UK for the United Kingdom. (for more than 1 separate with a comma, EX 'US,GB'
Domestic Free Shipping Threshold– Enter the purchase amount a customer must have before earning free shipping, this needs to be a number and will be in your stores default currency.
International Free Shipping Threshold – Enter the purchase amount an international customer must have before earning free shipping, this needs to be a number and will be in your stores default currency.
Free Shipping Text – Enter the text you want displayed to let visitors know how much they have left to earn free shipping. Ex: “Spend $5 more to earn free shipping on your order!”
Free Shipping Achieved Text – When customers carts exceed the threshold, your achievement text will display. Ex: “Congrats, you’ve earned free shipping!”