A:AnswerLED is the type of screen, the technology so to speak. In this case Lara’s is light emitting diode. “Smart” is the computing system that runs the technology. Smart TVs typically have Apps like Netflix, Hulu, etc installed on the tv so you don’t have to Stream from a phone or computer.
A:AnswerThe specs are available online. If by depth you mean front to back, this one is only a coupe of inches. I am not sure any TVs are more than 16" deep, even with a stand.