Verification
Confirmation of a user's or operation's identity/data. On exchanges — KYC by documents; in exchange it may be required for large amounts.
In more detail
Verification confirms the identity or data of a user/operation: on exchanges it is KYC by documents; in exchange it may be required for large amounts or card directions. It increases trust and reduces the risk of blocks, but takes time. Keep your documents ready if you plan a large operation.