As you said, it's a form of mint so it can be used in cooking. Physically, mint is said to be good for issues of the nasal tract, stomach, and chest- when I had a stomach ache as a child, my mother would always prepare me some mint tea and it would settle.
Around the house, use it for aromatherapy! It's great for creating a strong, fresh odour. The oil can also be used as an organic, natural insecticide for your plants. I use it on all of mine and I haven't had an issue with bugs since.
Metaphysically, it's used in occult practices for healing a lot. But it's also common to use it for money related matters/prosperity, protection and luck.
Hope this helps.