How does Wormhole work in Solana?

Could you please explain how Wormhole operates within the Solana ecosystem? I'm curious to understand the fundamental mechanisms behind its functionality and how it facilitates cross-chain interoperability. Could you also elaborate on its role in bridging different blockchains and enabling secure transactions? I'm interested in knowing how Wormhole contributes to the scalability and efficiency of Solana, and what are some of the challenges it faces in ensuring a smooth user experience?