The phrase "to report to" means to be responsible or accountable to someone, usually in a professional context. It refers to the act of providing information about one's actions and decisions to a higher authority figure within an organization. This can include submitting regular updates, progress reports, or other documentation detailing what has been accomplished and what still needs to be done. The person who "reports" is typically expected to follow guidelines set by the individual they report to, and may receive feedback, guidance, or direction from them as well. In essence, it means being answerable to someone in a supervisory capacity.