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 ...

VLOOKUP syntax = (lookup_value, table_array, col_index_num, [range_lookup]) here, Lookup value = The value to search for or lookup in the first column of the table.