Manhattan Borough President Gale Brewer’s Office:
The Community Boards play an important role in improving the quality of life for all New Yorkers. The purpose of each New York City Community Board is to encourage and facilitate the participation of citizens within City government within their communities, and the efficient and effective organization of agencies that deliver municipal services in local communities and boroughs.
The CB’s responsibilities according to charter – educate yourself on the actual role and responsibilities and authority of Community Boards.
https://www1.nyc.gov/assets/cau/downloads/pdf/know_your_community_board.pdf
Also useful guide on details of the job: https://www.manhattanbp.nyc.gov/communityboards/