Explore the fundamentals of Recurrent Neural Networks (RNNs) in this comprehensive lecture. Delve into the architecture, functionality, and applications of RNNs, understanding their ability to process sequential data and maintain internal memory. Learn about the key components of RNNs, including input, hidden, and output layers, as well as the concept of time steps. Discover how RNNs differ from traditional feedforward neural networks and why they are particularly effective for tasks involving time series data, natural language processing, and speech recognition. Gain insights into the training process of RNNs, including backpropagation through time (BPTT) and the challenges associated with long-term dependencies. By the end of this lecture, acquire a solid foundation in RNN concepts, preparing you for more advanced topics in subsequent sessions.