rfid applications

Before always hear people say RFID applications but I never touch this thing, so do not know this RFID applications in the end is what, so every time I hear people say when I was very curious, want to know the RFID applications in the end is what the product function in the end is how strong. I have so many online inquiries about RFID applications, but after all these are in the Internet to see there is no way that I can actually used to, until a time when our company was also installed RFID applications, now I personally use RFID applications only more think this product is really too much alike to me.