The Purge aims at reducing, or “purging,” spare historical data. Reducing the amount of historical data will make the process of validating the blockchain more efficient for validators under the new proof-of-stake consensus mechanism. This should minimize network congestion and allow many more transactions to be processed on the blockchain. Buterin said that by the end of this phase, Ethereum should be able to process 100,000 transactions per second.
Source: https://www.coindesk.com/tech/2022/08/01/ethereum-after-the-merge-what-comes-next/?utm_medium=referral&utm_source=rss&utm_campaign=headlines