How do you check if a transaction is real or not?

Excuse me, but I'm curious about how one can go about verifying the authenticity of a cryptocurrency transaction. In the vast and sometimes murky world of digital finance, it's important to stay vigilant and ensure that funds are being transferred securely and legitimately. Could you elaborate on the steps or tools that one might use to check if a transaction is indeed real or not? I'd appreciate any insights you could offer on this matter.