Avoid Using Entire Columns: Instead of using VLOOKUP with entire columns (e.g., VLOOKUP(value, A:B, 2, FALSE)), define a specific range or use a table to improve performance, especially in large ...

Adding or removing columns could affect the accuracy of the column index number. The lookup array must be the leftmost column, and the return array must be to the right. This restricts VLOOKUP's ...