Each working group oversees different matters. The meta-governance working group is in charge of oversight and governance issues, while the ENS ecosystem working group supports members and their issues affiliated with the domain service. The public goods working group is in charge of organizing and funding ENS projects within the wider web3 ecosystem.
Source: https://www.coindesk.com/business/2022/12/15/ethereum-name-service-dao-votes-on-stewards-for-three-working-groups/?utm_medium=referral&utm_source=rss&utm_campaign=headlines