KYC stands for Know Your Customer, a process where a service verifies the identity of its users. On many crypto exchanges and platforms, this means providing personal details and documents, such as an ID, before you can fully use the service.
KYC exists largely because of regulation. Services that connect crypto to the traditional financial system are often legally required to check who their users are, mainly to help prevent fraud, money laundering, and other illegal activity. It is a standard part of using most regulated exchanges.
Understanding KYC helps set expectations when signing up for a service. It also touches on privacy, since it means sharing personal information. This entry explains what KYC is and why it exists; it is educational and does not advise for or against using any particular service.