Depends what it is. You can select to have them just be labeled genuine and not graded on normal submissions. Unless it's some hoard most people choose to have the grade level displayed too as that does matter price wise.
DETAILS grades are NGC.
GENUINE is PCGS.
They're the same thing, just different terminology.
And the same result, reduction of value by at least 50%.
This isn't really accurate. The PCGS slabs will mention genuine but many will say Details as well.
General rule of thumb is that if a coin is not worth 200.00, its not worth sending in and paying the fees etc.
That's really not true in all honesty, that's an arbitrary number someone mentioned on forums long ago and it stuck.
From a strictly mathematical standpoint the only question is will the cost of grading be recovered from having it graded. Obviously you can't recover that if the cost is less than the grading, but there are plenty of coins under 200 where the cost of having them graded is more than recovered. There's even coins under 100 where that is true. Under 50 it gets hard but can be done.
All that said, the cheaper the coin the better your own skill has to be as the margin of error shrinks considerably and if you're off by a grade you can easily end up eating a loss.
The more you look into them, the more you will find the system is very subjective - as they themselves claim.
Grading itself is subjective, that has nothing to do with how the TPGs operate.
Here is an eye opener for newbies.
It's really not, I actually would say not to watch it at all until they understand more, otherwise they can find out the hard way