Why am I being charged with 1 AED pre-authorization fee? How would it be refunded?

Why am I being charged with 1 AED pre-authorization fee? How would it be refunded?

For us to save the payment method on your profile and to provide you with a seamless experience for all future orders, we pre-authorize your added payment method (ApplePay or Credit/Debit card) only once for an amount of 1 AEDwhich will be reversed back immediately from our end and refunded back as per the bank’s policy in 7 to 14 working days.