Silence below zero. ReLU—Rectified Linear Unit—lets your network breathe, bringing sharp nonlinearity to every hidden layer. When x drops, output collapses to 0: a digital on-off gate, immune to the vanishing gradient curse that haunted sigmoid and tanh. Most modern models start here: fast, efficient, and honest. ReLU distills signals, switching off the deadweight, pushing pure pattern forward into the next layer. Wear it if you know: the simplest signals build the deepest understanding.
