Because of the following reasons :

* Data Consistency : By applying consistent formatting throughout your Power BI reports and dashboards, you ensure that the visualizations and data representation maintain a uniform appearance. Consistency helps users understand and interpret the data more easily, as they don’t have to adapt to different formatting styles in different parts of the report.

* Accessibility : Proper formatting also ensures that your Power BI reports are accessible to a broader audience, including people with visual impairments or different viewing preferences. Following accessibility guidelines can be essential for compliance requirements in some organizations.

* Improved Readability : Proper formatting enhances the readability of data. Using appropriate font sizes, colors, and styles for text and numbers makes the information more accessible and reduces the chances of misinterpretation. * Emphasizing Key Information : Formatting can be used strategically to highlight essential data points, trends, or insights. For example, you can use bold or color to draw attention to critical KPIs or performance metrics.

* Professional Look and Feel : Applying general formatting makes your reports and dashboards look more professional and polished. This is especially important if you are sharing the reports with clients, stakeholders, or colleagues.