What does the oven function "Fan Grill" mean?

Ideal for cooking lean red and white meats, as well as fish, and perfect for satays, shellfish, grilling bacon or adding extra colour to foods. The fan diffuses the radiant heat from the top element, allowing the food to grill perfectly as well as cook through, all at the same time. To use the Fan Grill effectively, turn your oven to 200ºC. While using shelf 4 to grill, the rest of the oven is suitable for baking and general cooking on the middle shelves or, if at a low temperature, holding food.