Final answer:
You would use an HLOOKUP instead of a VLOOKUP when you have headings at the top of each column.
Step-by-step explanation:
When you have headings at the top of each column, you would use an HLOOKUP instead of a VLOOKUP. HLOOKUP stands for Horizontal Lookup and is used to search for a value in the first row of a table and return a value from a specified row in the same column. This is useful when you want to find data across different columns based on a specific heading.