Ground Notch?

[unearth]

I know this question has probably been asked, but, I still don't understand using the ground notch. I've seen a video on youtube where a gentlemen shakes his Deus in the air and it chatters. He sets his ground notch at a particular level and then shakes the Deus again and no chatter. I understand some users record the ground notch into their programs. Why? What does this help? I shake my Deus in the air and their is no chatter so I don't use it. Should I use it? If so, where do I set the ground notch at?
Thanks in advance for any help in this matter.

 

[CT Todd]

You have seen all the reasons. Less oddball beeps and chirps is why.

 

[Flintstone]

I to have trouble with knowing what GN is for. Dose it lock in a ground balance so it wont change or only let it change one way, " up or down" in one number or what.

 

[CO_T\Huntr]

Ground notch is for reducing the chatter and occasional false signals and
has no impact on depth or sensitivity...
I've put it in all of my programs and have a nice quiet machine most times

 

[Potomac run]

we know it works good but how much is to much? Is 75 to 90 to much