Answer:
Public interest litigation is the use of the law to advance human rights and equality, or raise issues of broad public concern. It helps advance the cause of minority or disadvantaged groups or individuals. Public interest cases may arise from both public and private law matters.
For example- If there is a Private factory in Delhi, which is causing pollution, then people living nearly, or any other person can file a PUBLIC INTEREST LITIGATION against: Government of Delhi. State Pollution Control Board, and. Also against the private factory.