What really is a VWAP trading strategy?

Question: What really is a VWAP trading strategy?

A number of trading job advertisements seemingly require that you have a basic understanding of VWAP trading strategies. In this regard, your task is to:

Address the question: Can a broker/trader “game” his/her performance to hedge fund and pension fund clients when executing a large order over a short-time period for an illiquid security? Discuss and provide examples.