Use Excel's conditional formatting to flag status changes, budget issues, missing data, duplicates, and deadlines ...

In Excel, common causes include using relative references in formulas (so the rule shifts unexpectedly), mismatched data types (e.g., numbers stored as text), or having multiple overlapping ...

Excel formulas are great until you need to stack 10 of them inside each other—one wrong bracket can ruin your entire afternoon. You can skip the headache by moving that logic into Power Query.