The board basically control the management and directors of the company and sets the strategies and long term visions that the company directors then implement.

The board basically control the management and directors of the company and sets the strategies and long term visions that the company directors then implement. In a day to day level, the way if achieving the goals are usually left to the CEO but sometimes there's also a so called operative board in which case the board is also present on a more direct level. The C-letter executives are responsible for hitting their targets set by the board, thus the board basically has a full say on everything that happens in a company.