Separate “data availability” layers could reduce congestion on the Ethereum network by making it easier for ancillary “rollup” networks to verify that transactional details exist and are available to download if needed — without actually downloading them. The concept might offer an alternative to Ethereum’s own proposed “danksharding” solution, seen as years away.
Source: https://www.coindesk.com/tech/2023/07/12/what-is-ethereums-data-availability-problem-and-why-does-it-matter/?utm_medium=referral&utm_source=rss&utm_campaign=headlines