Understanding inclinometer sensitivity

I am having difficulty in understanding the sensitivity of the ADXL355. According to the datasheet, the sensitivity is 256000 LSB/g. Can someone please explain what that number represents? How do I determine how sensitive the device is. Does it mean that the output will generate 0 to 256000 per g? How would I determine the output for 0.1 g? How does this relate to sensitivity? I am trying to determine the static sensitivity so I am not concerned about frequency response. 

I edited the original post to clarify that I was only interested in static sensitivity,
[edited by: graham641 at 12:07 AM (GMT 0) on 28 Sep 2019]