- Arbitrum (ARB) is one of Ethereum’s most promising layer 2 blockchains, designed to help improve the platform’s scalability. https://www.etoro.com/crypto/what-is-arbitrum/#:~:text=from%20its%20competitors.-,How%20does%20Arbitrum%20(ARB)%20work%3F,thus%20increasing%20the%20network's%20scalability 5 comments cryptocurrency
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