What is C CeX?

Could you please elaborate on what C CeX is? I'm not familiar with the term and I'm curious to know if it's a cryptocurrency exchange, a wallet service, or something else entirely. Is C CeX a reputable platform in the cryptocurrency space? What are some of its key features and services that make it stand out from other options? Additionally, how does it ensure the security of user funds and transactions? I'd appreciate any insights you can provide on this topic.