1. It is best to wrap the sweet potato with tin foil before baking, because this will reduce the loss of water and nutrients in the sweet potato, so that the baked sweet potato will taste better and the nutrients will remain more complete. When baking sweet potatoes, the temperature will be higher. If you don't wrap it in tin foil, the baked sweet potato will taste drier.

2. How long the sweet potato is baked in the oven depends on the size of the sweet potato, baking temperature and other factors. If the oven is heated in advance, sweet potatoes can be baked in an oven at about 230-250 degrees Celsius for about 30-40 minutes. However, if the sweet potato is big, it is recommended to extend the baking time, generally about 50 minutes. The specific time depends on the actual situation.