Marble may be stone, but it is very porous and stains easily. Wipe off anything spilled on marble immediately, just as you would from a wood surface. Use coasters under beverage glasses to avoid moisture rings.  Wine and juice are common stains on countertop surfaces.  Acids from fruit juice, carbonated beverages or other acids will etch your stone (remove shiny surface). Wipe up acid spill immediately, and wipe surface with wet cloth. If surfaced is etched, polishing may be required.

Occasionally wash marble surfaces with luke  warm water and wipe dry with a clean cloth. Wiping surface with a damp chamois will not leave streaks. Once or twice a year, depending on soil, wash with a mild detergent solution (hand dish-washing detergent and warm water), rinse and wipe dry.