Layer 2
A secondary framework or protocol built on top of a Layer 1 blockchain to improve scalability and reduce transaction costs. Examples include Lightning Network and Optimism.
Why It Matters
Layer 2 solutions are built on top of Layer 1 blockchains to improve scalability and transaction speed. They're important for addressing the limitations of the main blockchain, enhancing user experience and network efficiency.
Example
For example, the Lightning Network is a Layer 2 solution for Bitcoin, allowing faster transactions with lower fees. By operating as an additional layer, it alleviates congestion on the main Bitcoin blockchain.
Beginner Context
For those new to cryptocurrency, understanding Layer 2 is crucial for navigating networks as they can significantly enhance transaction capabilities. It’s particularly relevant as many popular networks face scaling challenges.
Mike Starr
Founder, CryptoWizardTools · M.S. Organizational Management
Last reviewed: August 2026
Related Terms
Paper Hands
Slang for an investor who sells their position at the first sign of a price decline, demonstrating weak conviction.
Exchange
A platform where users can buy, sell, and trade cryptocurrencies. Exchanges can be centralized (CEX) or decentralized (DEX).
Testnet
A testing environment that simulates a blockchain network, allowing developers to experiment without risking real assets.
Volume
The total amount of a cryptocurrency traded within a specific time period, indicating the level of activity and liquidity.
Altcoin
Any cryptocurrency other than Bitcoin. The term combines "alternative" and "coin" and encompasses thousands of different digital assets.