This depends on your camera or device. For example if you record your shots with a DJI Osmo, your shots are all stabilized by the DJI Osmo, the Iveo stabilization is not needed.
If you shoot your shots without a gimbal it can be wise to use Iveo Pro’s stabilization. The good thing about stabilisation is that your videos look less shaky. However stabilization does crop the video a bit in order to get rid of the camera shake.
By default Iveo Pro stabilizes all your shots, so if you’re not happy with the result, try to disable stabilization. You can find these settings in your preferences or you can disable the stabilization per shot.