What is the ZRX 0x protocol?

Could you elaborate on the ZRX 0x protocol? As a cryptocurrency enthusiast, I'm interested in understanding the underlying mechanics and functionalities of this emerging technology. Specifically, what role does it play in the decentralized exchange ecosystem? How does it facilitate the trading of digital assets in a more efficient and secure manner? I'm also curious about its potential impact on the broader cryptocurrency market and its long-term viability.