Business Intelligence is a technology-driven process that involves the collection, integration, analysis, and presentation of business information. It aims to support better business decision-making by providing comprehensive, accurate, and up-to-date views of business operations. The key functions include reporting, online analytical processing, analytics, data mining, process mining, complex event processing, business performance management, benchmarking, text mining, predictive analytics, and prescriptive analytics. It helps businesses convert raw data into meaningful and useful information for insightful business analysis, enabling strategic, tactical, and operational insights and decision-making.