Layer 2 solutions refer to protocols built on top of existing blockchain networks to enhance their scalability and efficiency. These solutions address issues like high transaction fees and slow processing times, commonly seen in underlying blockchain systems.One common example is the Lightning Network for Bitcoin, which enables faster transactions by creating off-chain channels between users. This allows numerous transactions to occur without needing to be recorded on the main blockchain each time, reducing congestion and costs.Another example is rollups, used in networks like Ethereum. Rollups bundle multiple transactions into a single one before submitting it to the main chain. This not only increases throughput but also maintains security, as the main blockchain still verifies the aggregated data.By utilizing Layer 2 solutions, users can enjoy quicker transactions and lower fees while still relying on the security and decentralization of the main blockchain. These innovations play a crucial role in making blockchain technology more accessible and practical for everyday use.