What exactly is the Android system on TV used for?

The one you are talking about is smart TV. This is the same as a mobile phone. In the past, we used ordinary mobile phones and could only make phone calls and send text messages. If you use TV, you can only receive signals from TV stations. Later, there was a smart phone, which was actually a small mobile computer. We can install all kinds of software on it, and we can also check the information we want online, watch videos and listen to music. Television will also develop in this respect in the future. We can also install software and surf the Internet. We will not passively receive TV programs. We can choose what we want according to our own wishes, which is much more convenient. As for the system, there are not only Android, but also other systems like mobile phones and computers. When it comes to smart TV, it is to transplant the functions of the computer to the TV. In addition, the function of smart TV can also be realized by adding a set-top box, such as the current Xiaomi box. In this case, the TV is equivalent to the monitor, and the set-top box is equivalent to the host.