What is GMX arbitrum?

Excuse me, but could you possibly enlighten me on the concept of GMX Arbitrum? I've heard it mentioned in the realm of cryptocurrency and finance, but I'm not entirely sure what it entails. Is it a specific type of decentralized exchange or perhaps a protocol that facilitates certain transactions? How does it differ from other solutions in the market, and what are its main features and benefits? I'd greatly appreciate any clarification you could provide.