Your IBAN is your International Bank Account Number. It is used to identify your bank account not just in your country but internationally.
🇪🇺 If you have a bank account in a European country (SEPA zone), you should have an IBAN number that identifies your bank account.
👉 It should be available in your bank account details in the section/document that shows how to receive wire transfers.
🏦 If you cannot find it, you should directly ask your bank about it.