What is a custodial Crypto Wallet?

Could you please elaborate on the concept of a custodial crypto wallet? Specifically, how does it differ from a non-custodial wallet? In a custodial wallet, who holds the private keys and how does this affect the user's control over their funds? Are there any security considerations or risks associated with using a custodial wallet? What types of investors or users might find a custodial wallet more suitable for their needs? And finally, are there any notable examples of custodial crypto wallets in the market today?