Machine learning (ML), a branch of AI, allows computers to learn from data and improve their performance without explicit programming. ML algorithms can analyze large and complex datasets, identify patterns and trends, and make predictions and recommendations. In healthcare, some of the most common ML algorithms are supervised learning, unsupervised learning, and reinforcement learning. Supervised learning algorithms learn from labeled data and can classify or regress new data based on the learned model; for example, it can be used to diagnose diseases based on symptoms, images, or biomarkers. Unsupervised learning algorithms learn from unlabeled data and can discover hidden structures or groups in the data; for instance, they can be used to segment patients based on their characteristics, behaviors, or preferences. Lastly, reinforcement learning algorithms learn from their own actions and feedback and can optimize their behavior based on a reward function; for example, they can be used to design optimal treatment plans or policies for patients.