Understanding, organizing, and validating data directly affects the accuracy of stories. New tools make cleaning accessible ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

Fragmenting your data across many Excel tabs is a common habit that silently kills file performance, introduces hidden errors ...

Learn when FILTER beats XLOOKUP, when it does not, and how to handle multiple matches, nth items, and multi-condition lookups with clear steps.