The adoption rate of Bitcoin's Lightning Network significantly impacts its scalability. As a layer-2 solution, it enables off-chain transactions, reducing congestion on the main blockchain. Higher adoption increases the network's capacity to handle more transactions per second, improving speed and lowering fees. With more users and nodes, the network becomes denser, enhancing routing efficiency and liquidity. However, low adoption limits these benefits, as fewer payment channels restrict transaction volume and reliability. Data from 2023 shows over 5,000 nodes and 75,000 channels, but growth has slowed compared to earlier years. For scalability to improve, businesses and users must integrate Lightning more widely, particularly for microtransactions. Challenges like channel management complexity and liquidity issues can hinder adoption, but tools like custodial wallets and better UX are helping. Ultimately, broader use directly correlates with better scalability. (134 words)