If you came from a technical field such as science and engineering, you would be very familiar with subscripts and superscripts. In fact, we often use a shorthand when typing subscripts and superscripts:
Google Sheets doesn’t have a setting for changing the characters to superscripts or subscripts, but there is a workaround. You can stick with the notation shown above, or use a set of Unicode number subscripts and superscripts.
You can check the Wikipedia page for the Unicode table:
These are excellent when you are entering numbers such as superscripts and/or subscripts. However, Unicode still does not have the whole alphabet available in superscript and subscript form, so you might want to think twice when you want to add whole words with it.
For now, you can use this workaround to add superscript and subscript numbers to your Google Sheets.