What is the main use for superscript or subscript

I volunteer teach MS Excel at a a local Food pantry and one question came up when I was reviewing the Font tab.under "Format Cells"...  What is superscript and Subscript and when/why would this feature/option be used...
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Superscript is smaller font size script that is raised to the top of the cell, sub script is the same thing only lowered to the bottom. One example of superscript is when you are using mathematical powers of a number eg. 2 squared, and subscript is used for annotations.

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Patrick MatthewsCommented:
Other uses for superscript would be for a footnote/endnote reference.  Sometimes ordinals are made with superscript.

Subscripts are often used in mathematical expressions, esp. Those having to do with series or sets, and in chemical formulae.
upobDaPlayaAuthor Commented:
Thanks for the info all
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