A recommendation system in AI is a type of technology that uses algorithms to suggest content to users. Those use data, machine learning, and NLP to provide personalized suggestions based on an individual's preferences and behavior. These systems are widely used by companies such as Amazon, Netflix, and Spotify to suggest products, movies, or music to users based on their past interactions with the platform.

For example, a recommendation system might track a user's purchases or view history on an e-commerce website and use that information to suggest similar products that the user might like. A music streaming service might use a recommendation system to suggest playlists or songs based on a user's listening habits. By providing relevant recommendations, recommendation systems aim to improve the user experience and increase customer engagement.