ISO 9362 is like a special code or nickname that banks use to talk to each other. Just like how you have a nickname that your friends might call you, banks use these codes to identify themselves when they're making international money transfers.
Now, this code is made up of a bunch of letters and numbers that can look pretty confusing but they are like a secret code that tells other banks which country the bank is from and also which specific bank branch it is.
So, when you want to send money to someone who's banking in a different country, you'll need to know their bank's ISO 9362 code. Without this code, the bank won't know where to send the money to.
Think of it as a secret code that banks use to communicate with each other when they need to send money across countries.