Neurons in a Neural Network (NN) are variables that hold numeric values representing data inputs.We adjust the importance of neurons through Weights and Biases, similar to knobs adjusted by a DJ.Changing weights and biases influences the output of a neural network, which aims to minimize error.Gradient Descent helps find the best set of weights by moving towards the minima of the error curve.Stochastic Gradient Descent improves efficiency and helps avoid local minima in training neural networks.Neural Network layers include Input, Hidden, and Output layers, with Hidden layers performing the core computations.Softmax function converts NN outputs into probabilities, aiding in classification tasks.Backpropagation adjusts weights and biases by comparing actual and expected outputs to increase accuracy.Epoch in NN training refers to one cycle of forward and backward propagation to improve model accuracy.Understanding neural networks and methodologies like backpropagation can lead to improved predictions and model accuracy.