Layer 2 refers to solutions built on top of a primary blockchain (Layer 1) to enhance its scalability and efficiency. These solutions aim to address issues like high transaction fees and slow processing times that can occur during periods of heavy network use.By handling transactions off the main blockchain, Layer 2 solutions reduce congestion, allowing for faster and cheaper transactions. Examples include payment channels, sidechains, and rollups, each with its unique mechanisms for processing data and ensuring security.Layer 2 is crucial for improving user experience and enabling broader adoption, especially for applications requiring high transaction volumes, such as decentralized finance (DeFi) and gaming. By alleviating the burden on Layer 1 networks, it helps maintain decentralization and security while accommodating increased usage. In essence, Layer 2 enhances the functionality of existing blockchains, making them more practical for everyday use.