Great question! A nonce ("number used once") is critical for blockchain security. Miners brute-force this number to solve the cryptographic puzzle that validates blocks. It’s like a lottery ticket—they keep guessing until they find the nonce that makes the block’s hash meet the network’s difficulty target. The Paybis glossary explains what is nonce it perfectly: The nonce ensures proof-of-work requires real computational effort. Without it, anyone could fake blockchain transactions cheaply. It’s why Bitcoin mining needs massive energy—finding the correct nonce is intentionally hard.