The Mathematical Puzzle Complexity feature in Proof of Work (PoW) allows the network to dynamically adjust the difficulty of cryptographic puzzles that miners must solve to validate transactions and create new blocks. This adjustment is crucial for maintaining consistent block times, which enhances the overall security and stability of the blockchain. By calibrating the complexity of these puzzles, the network can respond to fluctuations in mining power, ensuring that blocks are produced at a steady rate, which is vital for the integrity and reliability of the cryptocurrency system.