Basically, two forms of heat pumps exist:
Air-Source Heat Pumps: The most common heat pump converts the energy from your home to the outside air.
Ground-source (Geothermal) Heat Pumps: These carry heat from your home to the ground.
They’re better at this but more expensive to install.
The type that is right for you depends on what your house needs, where you live, and how much money you have.