Microsoft's spreadsheet program can do way more than you might imagine. These are the hacks and tricks you need to know.

A common source of errors in Excel is "the gap"—a situation where you add new data to the bottom of a list, but your formulas ...

Learn how GROUPBY passes both subset and full arrays into LAMBDA in Excel, letting you compute percent shares fast and explain results clearly.

Learn how to calculate weighted averages using Excel for various financial metrics. Simplify complex calculations with our ...

Your phone comes with strong built-in spam protection—you just need to turn it on. Here's how to do it on both iPhone and Android. I review privacy tools like ...