Utility of clip property in spreadsheet

I’m not understanding the utility of clip in this project. Directions:
The CSS clip property is used to define the visible portions of an element. Set the span[class~="sr-only"] selector to have a clip property of rect(1px, 1px, 1px, 1px).

The clip-path property determines the shape the clip property should take. Set the clip-path property to the value of inset(50%), forming the clip-path into a rectangle within the element.
Ive done some reading, so this hides parts of an image, but it doesnt have to be an image. Im trying to understand its utility on a spreadsheet? they “why”, the when ? I’m not understanding. right after we cover doing away wiht “sr-only” we are talking about making things not visible in this way as well. I’m just not understanding.

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