How to track a transaction with a reference number?

Hello there, could you please explain to me how one would go about tracking a transaction with a reference number? I'm quite new to the world of cryptocurrency and finance, and I've heard that using reference numbers can be a helpful way to keep track of transactions. However, I'm not quite sure how to do it. Could you provide me with some guidance on this matter? Perhaps you could walk me through the steps I would need to take to track a transaction with a specific reference number? Thank you in advance for your help.