What the hell is IBAN and BIC?

I need it for my Amazon account and I need to put them in, I’ve googled it and I’m still none the wiser.

I am registered for online banking which is where you apparently get it but I’ve not used it in so long that I now have to re-register where it will be sent to my dads, which isn’t handy as I’m not there to get it.

Is there any other way to get it?