What does Chief Operating Officer mean?The COO is a senior manager responsible for running a firm’s day-today activities, operations, and later reporting them to the CEO, or the chief executive officer. Every company needs a COO mostly because the chief executive officer is typically too busy to do the kinds of things that the chief operating officer does, like monitor quotas and different other factors on a day to day basis.

He or she is the executive who is solely responsible for the daily management of a company in question.