How to transfer Ethereum from Coinbase to metamask?

Could you please elaborate on the process of transferring Ethereum from Coinbase to MetaMask? I'm particularly interested in the step-by-step procedure, ensuring that the transaction is secure and efficient. Are there any prerequisites I should be aware of, such as ensuring my Coinbase and MetaMask accounts are properly set up and funded? Additionally, what are the common issues or pitfalls I should look out for during the transfer process? Your insight into this matter would be greatly appreciated.