I'm genuinely sure that this tecchie stuff is vitally important, at some level. However (and I'm being serious) I am a troglodyte when it comes to such things and not at all sure how I'm meant to interpret the data or what it means in terms of what or how I photograph.
No way will I knock this as I simply don't understand it, but reading some of the content of this thread has proven how little I know about the science element (no pun intended) of photography. For me, it's enough to have a rudimentary knowledge of how to load the stuff into the camera and take photos.
Incidentally, what is a "Katy Perry"....?