this random place let's try to understand how the landscape is changing what's the slope of the landscape we can take the gradient of the loss with respect to each of these weights to understand the direction of maximum ascent okay that's what the gradient tells us now that we know which way is up we can take a step in the direction that's down so we know which way is up we reverse the sign so now we start heading downhill and we can move towards that lowest point now we just keep repeating this process over and over