Description: The ‘ISNOTBLANK’ function is a fundamental tool in the DAX (Data Analysis Expressions) language, primarily used in data analysis and business intelligence applications. This function is responsible for checking whether a specific value is not blank, which is crucial for data manipulation and analysis. In the context of DAX, a blank value can represent missing, null, or empty data, which can significantly affect calculations and visualizations. By using ‘ISNOTBLANK’, analysts can filter data, perform conditional calculations, and ensure that metrics are based solely on valid values. This function is particularly useful in creating measures and calculated columns, where data accuracy is essential for obtaining meaningful results. Additionally, its use helps improve the quality of reports and dashboards, allowing users to make informed decisions based on complete and accurate data.