InfluxDB is a leading time series database that stores and analyzes billions of devices' data every nanosecond. To get data into InfluxDB, users can use multiple formats like CSV, and translate it into line protocol using the InfluxDB CLI and client libraries. Line protocol consists of measurement name, fields, tags, and optional timestamp. The Influx CLI provides commands to manage and interact with InfluxDB, including writing data directly from annotated CSV files. The InfluxDB Client Libraries offer language-specific packages to quickly interact with the InfluxDB v2 API, allowing users to process and package data in their preferred programming language.