Which TV Is The Best To Buy?

I want to buy a new TV . For this, I have seen various kinds of TV and it seems to me that all TV are good But I know all are not good. For this, it’s very hard to choose perfect TV for me because I don’t know and understand anything about electronic product even in TV. But I want to buy a good TV. So I want help from the expert person.
My questions is –
What should I see before buying a new TV?
I will be very grateful to you if you help me to buy a good TV.
Thanks to all