What is the main reason for using formatting options for visuals in Power BI?

The main reason for using formatting options for visuals in Power BI is to enhance the appearance and interpretability of visuals. Effective formatting is crucial because it allows users to communicate data insights clearly and effectively. By adjusting colors, fonts, labels, and other visual elements, users can draw attention to key data points, improve readability, and ensure that the visual aligns with the intended message or theme. This visual enhancement plays a vital role in ensuring that users can easily understand and engage with the data presented, ultimately facilitating better analysis and decision-making.

Other options mentioned, such as modifying the data model structure, restricting user permissions, and creating data connections, serve different purposes within Power BI and do not directly relate to the visual presentation of data.