TPL Dataflow is a .NET library that enables developers to create data processing pipelines and workflows, allowing for efficient and scalable handling of data-intensive tasks. By providing a high-level abstraction for concurrent and asynchronous programming, TPL Dataflow is particularly relevant to the tech community as it simplifies the development of complex data processing applications, such as those used in data analytics, scientific computing, and real-time data processing, making it easier for developers to build robust and maintainable systems.