mercury in general:
Mercury - the small, intensely hot and extremely fast moving planet is often called the "messenger" of the heavens. Mercury governs all forms of communication in an individual's life. How we relate to others and the world around us is ruled by this speeding orb which travels close to the Sun.
Mercury is also the ruler of intellect and travel. To a large extent, how we perform in the professional, personal and social arenas is also governed by Mercury because communication is such a universal part of our lives. Decision making and deliberation is also frequently governed by this planet.