What is the feature?
Numbers are always displayed “raw”, as a string of digits. Example:
My deficient human brain needs spaces to better understand. Please marvel at the concept art:
One could even opt for short-hands:
With hovering displaying the number in all its glory, and the “copy” feature still copying the string of unspaced digits.
What problem does this solve for you?
Legibility.
While the above example is sort of trivial, this does become important when dashboards are concerned!
Who else would be using this feature?
Anyone displaying numbers, so basically the whole user base.