A Principal Investigator (PI) is a lead researcher responsible for the planning, execution, and management of a research project. They oversee the research team, ensuring that the project meets its objectives and adheres to ethical standards. PIs often secure funding through grants and are accountable for the project's budget and timeline. In academic and scientific settings, PIs typically hold advanced degrees and have significant expertise in their field. They play a crucial role in publishing research findings and may collaborate with other researchers, institutions, or organizations to advance knowledge in their area of study, such as biomedical research or social sciences.