The significance of data visualization in big data lies in its ability to transform complex data sets into easily understandable graphical formats. This enhances decision-making by enabling users to identify patterns, trends, and outliers that would otherwise remain hidden in raw data. Effective data visualization tools help stakeholders grasp intricate relationships and insights quickly, promoting data-driven decision-making. Moreover, visualizations can engage diverse audiences, conveying important information succinctly and making analytics accessible to non-technical users, which is crucial in leveraging big data for organizational benefit.