movies or "fly-throughs," have the ability to show off your project to a client, putting them in the driver seat, as if they are walking through the actual project.

suggestion:
before getting started making a movie, be sure all the details are finalized. use the 3D explore option to view your model inside and out to check every detail. after all the details have been verified, check the cameras, by clicking on each one, to see if the view is correct.
render movies can take a long time, overnite for 30 seconds of final product,
so do the 3D window version first, until you get all the camera angles just right, then do a photorendering movie.