What is Coinbase clone script?

Could you elaborate on the concept of a "Coinbase clone script" in the context of cryptocurrency and finance? I'm particularly interested in understanding its purpose, functionality, and potential implications for businesses or individuals looking to enter the crypto exchange market. Specifically, how does such a script allow for the creation of a platform similar to Coinbase, and what are the key considerations and challenges associated with utilizing such a script? I'd appreciate a concise yet thorough explanation that covers both the technical and business aspects.