TensorFlow is an open-source library developed by Google for machine learning and deep learning applications. It provides a flexible framework for building and training complex neural networks, enabling developers to tackle a variety of tasks such as image recognition, natural language processing, and speech recognition. TensorFlow operates using a dataflow graph model, where data is represented as multi-dimensional arrays called tensors. This allows for efficient computation and optimization, particularly when leveraging GPUs for training. With its extensive tools and resources, TensorFlow has become a popular choice for both researchers and practitioners in the field of artificial intelligence.