Interactive animations are animations that allow the user to move around a model similar to how a person will move around a compter game. A standard animation is an animation which follows a specific path specified by the animator.
Model Review - As a user can view the model at their own pace it is an excellent project review tool
Clash Detection - Interactive models can be used for clash detection by walking around a model and reviewing items in the model
Training - Interactive models can be used for training allowing the training before going to site