TensorFlow is an open-source library developed by Google, designed for machine learning and deep learning applications. It enables developers to create and train complex neural networks to tackle various tasks, such as image recognition, natural language processing, and speech recognition. TensorFlow operates using multi-dimensional arrays called tensors, which facilitate the flow of data through a series of operations in a computational graph. This framework is known for its flexibility, scalability, and efficiency, making it a popular choice among researchers and developers for building sophisticated machine learning models. Its extensive tools and features also support debugging and optimization of models.