What is a debit TXN transaction?

Can you explain to me in simple terms what a debit TXN transaction is? I've heard the term used in the world of cryptocurrency and finance, but I'm not entirely sure how it differs from other types of transactions. Is it similar to a credit card transaction in any way? Or is it more like a direct transfer of funds from one account to another? I'm curious to learn more about how debit TXN transactions work and how they are used in the cryptocurrency and finance industries.