Teaching the Model "Where to Look"
The attention mechanism Bengio and collaborators conceived let a neural machine translation model, in generating each word of the translation, dynamically review the part of the input original most relevant to the current word, rather than, as earlier models did, being forced to compress the whole input into a fixed-length vector and then decode it all at once — this design idea of "dynamic attention on demand" was thereafter proven one of the most important intellectual breakthroughs in deep learning’s handling of sequence data, and the Transformer architecture three years later precisely carried this idea to its extreme.