TensorFlow is an open source machine learning framework developed by Google. It has several advantages over other frameworks including its flexibility to run on CPU, GPU, and in distributed environments. The document discusses key features of TensorFlow such as its Python API and compares it to other frameworks. It also explains how TensorFlow can be used for deep learning applications on large, unstructured datasets with tools like Keras and how its distributed capabilities allow training on multiple GPUs and even across clusters.