InfluxDB is an open-source time series database optimized for storing, querying, and analyzing time-stamped data such as metrics, events, and logs. It is designed for high write and query performance, making it ideal for use cases like monitoring systems, IoT sensor data, and real-time analytics. InfluxDB supports SQL-like queries with its InfluxQL language and offers built-in functionalities for downsampling, retention policies, and data aggregation. Its scalability and ability to handle large volumes of time series data make it a popular choice for time-based data analysis and monitoring solutions.