The highest impact of IoT has been on the Smart Devices. As the name itself suggests smart devices are the devices that have grown smart, that have the ability to do things that even only the great minds are capable of. Google speaker for an example is a smart device that acts upon voice recognition. As the user commands the device via voice the device performs the action. It can do everything a normal speaker can and in fact more just with a means of voice. Similarly, Motion sensor light is a device that decides to whether turn on or off a light just by sensing the presence of a person in the room.