Do I need to verify on Changelly?

Hello there, I'm curious about using Changelly for cryptocurrency transactions, but I'm a bit unsure about the verification process. Can you explain to me if it's absolutely necessary to verify my identity on Changelly before I can start exchanging my coins? Is there a limit to how much I can trade without verification? And if I do decide to verify, what kind of information will I need to provide? Thanks in advance for your help!