What are DAX formulas in Power BI, and how do they work?

Data Analysis Expressions (DAX) is a formula language used in Power BI to perform data manipulation and create custom calculations. Power BI Experts often use DAX to derive complex insights, enabling advanced analytics such as time intelligence, conditional formatting, and data filtering. While DAX may seem challenging initially, mastering it can unlock powerful capabilities within Power BI, allowing users to manipulate data dynamically and tailor it to specific analytical needs. For example, with DAX, users can calculate monthly sales growth or create KPIs, making reports more insightful and decision-oriented.