What does the oven function "Fan Assisted" mean?

Just like Classic Convection however with the oven fan giving a perfect all round heat. This is the most efficient function to use when requiring the whole oven, with particular attention to browning and base heat. The top shelves are perfect for cooking and colouring at the same time, i.e. finishing roast vegetables, cauliflower with cheese sauce, fruit crumbles and lasagne. The bottom element is ideal for pies, reheating casseroles and stews, and baking.