Scalability refers to the ability of a blockchain network to handle an increasing amount of transactions efficiently. As user demand grows, the network must accommodate more transactions without experiencing delays or increased costs. A key challenge in achieving scalability is balancing speed and decentralization. Many networks struggle to process large volumes of transactions quickly while maintaining a decentralized structure. Solutions often involve optimizing existing protocols or implementing new technologies, such as layer-2 solutions or sharding. Layer-2 solutions, like Lightning Network for Bitcoin, operate separately from the main blockchain to process transactions more quickly. Sharding splits the blockchain into smaller, manageable pieces, allowing multiple transactions to be processed simultaneously.Effective scalability is crucial for widespread adoption and usability, enabling seamless transactions for everyday users. Without it, network congestion can lead to slower processing times and higher fees, which may deter users and limit overall growth.