but the question is always where does the information come from and how is it aggregated okay in a convolutional layer what happens in a convolution layer in a convolution layer you simply have your filter right you have your filter and the filter has numbers in it like three and five and eight and so on and what you're going to do is you're going to take this region right here this blue region of the lower layer and that's maybe that's also you know filled with numbers like seven what's a good number zero zero is a