What is the 1inch?

Could you please elaborate on the concept of 1inch in the context of cryptocurrency and finance? I've heard it mentioned but am not entirely familiar with its functionality and role in the market. As a professional in this field, I'm interested in understanding how 1inch facilitates transactions and what makes it unique compared to other decentralized exchange protocols. Does it offer any specific advantages or services that other platforms don't? Any insights you could provide would be greatly appreciated.