What is a director?
Within the context of a corporation, the directors are the managers with broad powers which they exercise in making the big policy decisions affection the company. Such decisions would include when stock should be issued, the purchasing or selling of property, the election of corporate officers, mergers and acquisitions, other major transactions the corporation needs to undertake, etc.
The incorporator and/or the original shareholders will determine how many directors sit on the board, and this will generally appear in the articles of incorporation and/or the corporate bylaws.