# Concepts

- [Key Concepts](https://docs.fluentbit.io/manual/1.9/concepts/key-concepts.md): There are a few key concepts that are really important to understand how Fluent Bit operates.
- [Buffering](https://docs.fluentbit.io/manual/1.9/concepts/buffering.md): Performance and Data Safety
- [Data Pipeline](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline.md)
- [Input](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/input.md): The way to gather data from your sources
- [Parser](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/parser.md): Convert Unstructured to Structured messages
- [Filter](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/filter.md): Modify, Enrich or Drop your records
- [Buffer](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/buffer.md): Data processing with reliability
- [Router](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/router.md): Create flexible routing rules
- [Output](https://docs.fluentbit.io/manual/1.9/concepts/data-pipeline/output.md): Destinations for your data: databases, cloud services and more!


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