What is PYTH on Solana?

Could you kindly elaborate on the subject matter of PYTH on Solana? I'm curious to understand what PYTH represents within the Solana ecosystem and how it functions. Could you explain its purpose, any unique features it might possess, and how it contributes to the overall functionality and utility of the Solana network? Additionally, I'm interested in knowing about any potential applications or use cases of PYTH, as well as any challenges or limitations it might face. Thank you for taking the time to address these inquiries.