Fluentd is an open-source data collector that can retrieve and receive event data from various sources, filter, buffer, and route data to compatible destinations. It supports multiple sources and destinations and can be deployed on multiple operating systems. Fluentd has a unified logging layer, is horizontally scalable, and has a robust plugin system, making it suitable for collecting log events from thousands of machines. InfluxDB is an open-source time-series database that stores and queries time-series data, offering performance optimization, improved data compression, and built-in tools for working with time-series data. The tutorial demonstrates how to install Fluentd on Ubuntu Linux, receive syslog data from a source, and send it to an InfluxDB instance, showcasing the benefits of using Fluentd as a centralized log event routing engine and InfluxDB for storing and querying time series data.