The Internet of Things (IoT) involves networks of connected devices that generate large amounts of timestamped data across various industries such as energy, manufacturing, and supply chain, requiring rapid ingestion, processing, and analysis to extract valuable insights. IoT environments face unique challenges due to their intersection of physical hardware and digital software, including data diversity, security concerns, and the need for specialized skills. Most IoT applications utilize streaming platforms like Apache Kafka or Amazon Kinesis for data ingestion, followed by data cleaning and storage in real-time databases optimized for analytics. IoT analytics can be categorized into descriptive, predictive, and prescriptive analytics, each serving different needs from long-term trend analysis to real-time decision-making. Apache Druid is highlighted as a real-time analytics database well-suited for IoT due to its ability to handle large volumes of fast-moving data, support complex queries, and scale elastically, making it an effective solution for managing the dynamic and varied nature of IoT data.