What is a set-top box, and what types are there?

A set-top box sits between your TV and your content source and turns a signal into what you watch. There are four main kinds in India: a DTH box (a satellite receiver for Tata Play, Airtel, Dish TV or d2h); a streaming device (a Fire TV Stick, Chromecast or Apple TV that plays apps over the internet); an Android TV box (a fuller device for apps and, with a service, live TV); and a free-to-air box (like DD Free Dish, giving free channels with no subscription). The right one depends entirely on how you want to receive your channels.