Using IPTV on Amazon Fire Stick is simple and convenient. Start by subscribing to a reliable IPTV service like IPTVzi. On your Fire Stick, go to the Amazon App Store and download an IPTV app such as IPTV Smarters, Perfect Player, or TiviMate. Once installed, open the app and enter the login details provided by your IPTV service. Input the M3U URL or Xtream Codes to load the channel list. With the app set up, you can now enjoy live TV, video on demand (VOD), and catch-up TV on your Fire Stick. Ensure your internet connection is stable for the best viewing experience.