Can I send ETH using Optimism?

Hello there! I've been looking into Optimism, the Ethereum Layer 2 scaling solution, and I'm wondering if it's possible to send ETH using Optimism. I'm familiar with the concept of Layer 2 solutions helping to reduce transaction fees and improve scalability on the Ethereum network, but I'm not entirely sure how Optimism specifically fits into the picture when it comes to sending ETH. Can you clarify whether or not it's possible to send ETH using Optimism, and if so, how it works? Thanks in advance for your help!