Here are the best Layer 2 coins on the Ethereum network with a brief explanation for each one:

• Arbitrum (ARB): The most popular Layer 2 solution that uses Optimistic Rollup technology, significantly reduces gas fees, and allows DeFi and NFT applications to operate more efficiently.

• Optimism (OP): The second largest Layer 2 also relies on Optimistic Rollup, focusing on ease of use and supporting major projects like Uniswap.

• zkSync: Layer 2 that uses zk-Rollups technology, provides fast and secure transactions with low fees, and is of great interest to developers.

• StarkNet: Layer 2 that uses zk-Rollups from StarkWare, very strong in speed and security but still in development.

• Loopring (LRC): Focuses on trading and exchanging coins via DEX with almost no gas fees, providing fast and secure execution.

• Immutable X (IMX): Specializes in trading non-fungible tokens (NFTs) with no gas fees while maintaining Ethereum's security.

• Metis DAO (METIS): Uses Optimistic Rollup with a focus on scalability and ease of creating decentralized organizations (DAOs).