If at all possible grow them outside in full sun. You may also grow it indoors but it need a lot of light so be sure you place it near a window with maximum exposure.
The plant should always be standing in a few centimeters of the pure water. Try to use distilled, reverse osmosis, or clean rain water.
These are hungry plants and if they are not catching their own food you may need to give them a hand. You should ideally feed the traps with live insects. If you use dead food, the traps may need to be stimulated to close in order to digest the insect.
Dionaea muscipula, 'DC XL,' Giant.