Another important point in the article is that cash is typically not transferred, but instead (basically) “your account at my bank is credited equal to the amount that you debit from my account at your bank”
If I want to wire you some cash from bank A to bank B, my bank (A) will debit my account,and credit their account (called a nostro). There, we have two possibilities :
* The two banks are connected (meaning B has an account in A), A will debit their nostro and credit the account of B in A (called a loro) and inform bank B via swift. B will debit the account of A in B, credit their nostro, debit their nostro and credit your account
* The two banks are not directly connected : A will debit my account and credit their nostro. They will then debit their nostro and credit the account of a third institution (another bank or a clearing house). They will send a message to the bank B and the third institution, telling them that the cash should be credited to you. If the bank B and the third institution are connected, see above. If not, the process goes on, until the cash "reaches" bank B.
This is highly simplified, but it's the principle.
No need to be sorry, but yes, Wikipedia articles can be a bit "vague" sometimes, it was just the first reference I found, maybe this one on investopedia is better, though it is also seemingly putting an accent on foreign currency/foreign banks, which I don't believe is the only use (I mean the concept applies to banks in a same country as well, AFAICR):
As I said, Nostro is also used for own accounts. The account refleting the position of the bank (its own money and assets, not the money or assets deposited by its clients) is also called a nostro, at least in Europe.
