The import option is expressly for the use of companies/shops based outside the European Union (EU) selling their physical goods to European customers.
By enabling the option Enable IOSS procedure, the EU customer who purchases from this non-EU shop will get VAT exemption if the order total is above the 150€ threshold.
IOSS threshold allows changing the default threshold value (€150) into the converted value based on the currency used if different from euros.
You can enter a text in IOSS VAT exemption message to be shown as a VAT exemption message to customers in the checkout.
Finally, you can also choose to view the IOSS report by orders to which the IOSS has been applied or by country.