The easiest way: Wired HDMI
The most basic PC-to-TV connection consists of running a wire from your computer to the HDMI input on your TV. If you have an older TV and an older laptop, there are options like VGA as well.
More wired tips: There are so many varieties of laptops out there, we can’t make a blanket statement that a particular adapter will work for your PC. If you’re not sure, Google your brand and model before you buy any kind of adapter.
Casting from a Chrome browser: If you don’t have a TV device with AirPlay or Miracast compatibility you can still mirror your screen from the Chrome browser on any laptop, using a ChromeCast.
Casting from a Android device:
If you have an Apple computer: The easiest way is to use AirPlay. But you’ll need a device that supports it, namely:
If you have a recent Windows 10 PC: There’s something called Miracast. Miracast can be used with a Roku or a Windows Wireless Display Adapter.