A data analyst plays a crucial role in business intelligence by transforming raw data into meaningful insights that inform decision-making. Their responsibilities include collecting, processing, and analyzing data from various sources to uncover trends and patterns. By utilizing statistical tools and data visualization techniques, data analysts help organizations understand their performance, identify opportunities for optimization, and enhance strategic planning. They also collaborate with stakeholders to define key metrics and ensure that data-driven recommendations align with business goals, ultimately driving value across the organization.