Fluent Bit is a lightweight log collection tool that can be used to collect, parse, and forward log data from various sources with a small memory footprint, making it suitable for environments with limited resources. It can be integrated with Datadog to centralize logs and gain valuable insights by monitoring and correlating log data with application metrics and traces in one platform. The Datadog plugin allows users to easily add and configure the integration, forwarding logs to Datadog's logging endpoint through a secure connection, and associates logs with related traces for easier troubleshooting. With this integration, users can explore and analyze their logs in one place, monitoring trends and identifying issues in their applications, and routing logs to Datadog for visualization and analysis.