The main role of machine learning in predictive analytics is to analyze historical data and identify patterns to forecast future trends. By employing algorithms, machine learning enables organizations to make data-driven decisions, improving accuracy in predictions related to sales, customer behavior, and market conditions. It empowers businesses to identify risks and opportunities, leading to optimized strategies and more effective resource allocation. Machine learning continually enhances its predictive capabilities as it processes more data, adapting to emerging patterns for better outcomes.