How to connect iPad to TV?

Depends on your model/ports. My iPad has a lightning port, so you need a lightning > HDMI adapter like this:

https://www.apple.com/shop/product/md826am/a/lightning-digital-av-adapter

Then you get an HDMI cable, plug it into your TV. Change your input on remote to that HDMI port and you should get your iPad's screen on TV.