In such a situation, you can use what's called an absolute reference in Excel, which won't change when you drag or copy it from cell to cell. To create one, precede the row letter and column ...

Cells in Excel are referred to using relative or absolute references. A formula with relative references changes when the cell's position does.

Named ranges make formulas far more readable and manageable. For example, instead of referencing cryptic cell addresses like A1:A100, you can use descriptive names like SalesData or ExpenseCategories.