As soon as you start selling products from your platform, you'll have to set the currency that applies to those products. At your first login, as part of your onboarding process, you will be requested to pick a currency. You can modify it later on.
How to do
▶︎ Quick path: E-Commerce > Manage > Setup > Currency
Note that you cannot sell in multiple currencies. You will need to select only one.
✅ Quick tip: Start typing to quickly find your currency!