Event streams are sequences of events that occur over time, often generated by various sources like applications, sensors, or user interactions. These events are typically recorded in real-time and can include data such as user actions, system alerts, or transactions. Event streams allow organizations to monitor and analyze activities as they happen, providing valuable insights for decision-making. In the context of data processing, event streams are often used in technologies like Apache Kafka or Amazon Kinesis. These platforms enable the efficient handling of large volumes of data, allowing businesses to react quickly to changes and improve their operational efficiency.