A smart tv by the name “smart” includes firetv or roku or android or some other proprietary built in internet stream ability. The Vizio tv we bought was slow to react and I didn’t like the “smart cast “ interface . so we plugged in the fire stick to an hdmi port and just use it. When you purchase a new one be aware of the streaming system it uses if it matters to you. Roku is probably more prominent in TV’s I’ve seen … Truth is while they all use different looking menus they all do the same thing if you get used to them.