Adjustable Block Size refers to a mechanism that allows the size of blocks in a blockchain to change based on network demand. Blocks are collections of transactions that are processed together and have a maximum size limit, which can affect the speed and efficiency of transaction processing.When demand for transactions increases, a larger block size can be created to accommodate more transactions in each block. This helps reduce congestion and lowers fees, ensuring that users can have their transactions processed quickly.On the other hand, if the network is less busy, smaller block sizes can be used, which conserves resources. This flexibility aims to strike a balance between efficient processing and network stability, adapting to varying transaction volumes over time.Adjustable Block Size can help a blockchain network become more scalable and user-friendly, as it allows for responsiveness to changing conditions without necessitating hard forks or complicated updates. This can contribute to a more resilient and efficient system overall.