This item is just the glass that you slide your finger on, If that cracked you can replace with this part, which is called Digitizer. It is NOT an LCD and does not produce any image.
It's a complicated work to open the iPhone and replace the touch screen. It requires techniques on cell phone fixing. If you are not proficient on that, it's probable to damage it.
Installation guidance is not included, please search for guidance online or use some technical service. Please test it on the main board of your cell phone before installation.