Explore the foundations of deep learning in this introductory lecture from MIT's 6.S191 course. Delve into key concepts including perceptrons, neural networks, activation functions, loss quantification, backpropagation, and optimization techniques. Learn about the challenges of training neural networks, adaptive learning rates, and strategies to prevent overfitting. Gain insights into deep learning's successes in vision and audio applications, and understand why this field has become so influential. Access additional lectures covering topics such as sequence modeling, computer vision, generative models, reinforcement learning, and industry perspectives from leading tech companies.