Is FX real or fake?

I'm quite perplexed about something that has been bugging me for a while. Could you possibly shed some light on this matter? I've been hearing a lot about FX, but I'm not quite sure if it's genuine or just another hoax. Is FX real or fake? I've read some conflicting opinions online, and I'm really struggling to make a decision. Could you please clarify this for me? It would mean a lot to me if you could provide a comprehensive explanation. Thank you so much for your time and assistance.