Keras is an open-source neural network library written in Python. It is a high-level API that provides user-friendly and intuitive deep learning layers, models, optimizers, and tools. Keras simplifies the development of deep-learning models by providing a common interface for building and training neural networks. It also provides a set of pre-trained and reusable components to build complex architectures.

https://www.datascienceverse.com/machine-learning/creating-an-accurate-predictive-model-using-keras-and-its-techniques/