LCD Keypad pin 10

Sorry if this has been done to the death. I am in the process of ordering an LCD Keypad for my Arduino Uno. I have read loads of stuff about pin 10. I am really confused, some say do not use pin 10 (does that mean that I cannot use the backlight facility?). I would be very grateful for help in exactly what to do about this pin.
Thanks
Brian
Thanks
Brian
