Just-In-Time (JIT) refers to a system for managing data and transactions efficiently by processing them only when needed. In this approach, resources are allocated and actions are taken at the precise moment they are required rather than in advance. In the context of blockchain, JIT can help streamline transaction processing. Instead of preemptively confirming numerous transactions based on estimations, the system waits until there is sufficient demand or clarity about the transaction, reducing delays and minimizing unnecessary resource usage. This method can enhance scalability, allowing networks to handle greater volumes of transactions without bottlenecks. By optimizing performance, JIT can contribute to faster confirmations and lower fees, benefiting users by improving the overall experience when using such systems. Through JIT, networks can adaptively respond to changing conditions, making them more efficient and responsive to user needs.