InfluxDB is an open-source time series database that stores and analyzes data points over time. It's optimized for storing and querying large amounts of time-stamped data, making it particularly useful for applications such as financial trend analysis, IoT sensor monitoring, and sales forecasting. InfluxDB provides a free open-source version that can be run locally, as well as a cloud-based version that supports major cloud services like AWS, GCP, and Azure. The database has a pre-built dashboard for visualizing data and supports asynchronous and synchronous writes. It also includes features such as data point structure, CRUD operations with Python client library, reading data using queries, updating data by performing write operations, deleting data using delete_api, and best practices for writing data.