Often most houses will have insulation gaps, that will result in poor thermal efficiencies that cause additional heating or cooling costs. These are shown in most reports if an issue is found.
Overloaded wiring caused heat signatures can be found on fuse boards, thermography can alert you of this dangerous wiring issue.
The variances in temperatures are shown in colours, cool is purple or black, while hotter is yellow or white.
Thermal cameras can even detect the location of wall framing or missing wall framing in structures that have been completed. This is often seen in garage conversions done by DIY house flippers.
Unfortunately, due to temperature variations of a house, if a house has been closed up for a long time, the camera will not see any temperature differences and find nothing, as the house is all the same temperature.
This is why both a moisture meter and a thermal camera is required when inspecting.
Thermal cameras can also be used for assisting in finding termite mudding behind walls and other issues.