Keras is very powerful library which can be used to solve many use cases:

Keras can be used to build and train neural networks for image classification tasks, such as identifying objects in images or labeling images

Image classification

Keras can be used to build and train neural networks for NLP tasks, such as language translation, language generation, and text classification.

Natural language processing

Keras can be used to build and train neural networks for speech recognition tasks, such as transcribing spoken words into text.

Speech recognition

Keras can be used to build and train neural networks for time series analysis tasks, such as predicting stock prices

Time series analysis

Keras can be used to build and train neural networks for fraud detection tasks, such as identifying suspicious credit card transactions

Fraud detection

Disadvantages of keras