How do I bridge from Optimism to mainnet?

Hello there, I'm curious about how one can bridge their assets from the Optimism network to the mainnet. I've been hearing a lot about the potential benefits of this transition, but I'm not sure where to start or what steps are involved. Could you please explain the process in detail, including any potential risks or considerations I should be aware of? I'd greatly appreciate any insights you can provide. Thank you!