Make sure your hands are clean and use the microfiber cloth provided with the screen protector, to clean your screen from one side to another slowly. Remember : DO NOT wipe it back and forth.
There is a back layer with the screen protector, remove it and align the protector at the top or bottom. After the alignment, apply it on the screen carefully.
To push bubbles out of the screen protector, use a credit card and make sure there is no bubbles before you use your smartphone. Removing bubbles is the most difficult part, doing mistakes may have you to reapply the screen protector.
Watch the Video for More Info