Data visualization consulting company assists with data governance by establishing protocols for data accuracy, consistency, and security within visualization tools. They help define data access controls, ensuring that sensitive information is only visible to authorized users. Consultants also standardize data formats and ensure that the data used in visualizations adheres to compliance requirements. By implementing these governance practices, consulting companies help businesses maintain data integrity across all visualizations, reducing the risk of errors and ensuring that decision-making is based on reliable and compliant data.