Streaming sticks such as Roku smarten up dumb TVs by enabling you to watch services such as Netflix, YouTube and Amazon Prime. You plug the Roku into your TV's HDMI port and you need a decent WiFi connection to stream content to it. I bought a Roku last year but returned it as live US Open Tennis was not supported, so I got a competing Amazon Fire TV stick which did work.
The remote was fairly basic but worked well. All in all it's a good stick. Note that if you still want TV you can get Freeview but an external aerial is needed for guaranteed good reception, or there are other options such as a YouView box from BT, TalkTalk and Plusnet.
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Hub 3.0, TP-Link Archer C8, TP-Link TL-SG1008D 8-port gigabit switch, V6