What are Coinbase's new confirmation requirements?

Could you please elaborate on the recent changes in Coinbase's confirmation requirements? I'm interested to know what specific measures have been implemented and how they might impact users' experience on the platform. Additionally, are these new requirements in response to any particular regulatory changes or security concerns? It would be helpful to gain a clearer understanding of the motivations behind these updates and how Coinbase is ensuring the safety and security of its users' funds.