The GROUPBY() Secret You’ve Been Waiting For! - Excel Tips and Tricks If you're still here, I know you’re ready to unlock next-level Excel power—so let’s dive in! Here’s How GROUPBY() Works Like Magic: ✔ Group ONE column SUM? Easy: =GROUPBY(Region, Sales, SUM) ✔ Group MULTIPLE columns (Region Product)? Slightly trickier: =GROUPBY(HSTACK(Region, Product), Sales, SUM) ✔ Group MULTIPLE columns AND return SUM AVERAGE? 🎯 Boom: =GROUPBY(HSTACK(Region, Product), Sales, HSTACK(SUM, AVERAGE)) 💡 Pro Tip