Deep feature : a notion in machine learning referring to a feature that is computed using a complex algorithm, often a neural network, that transforms simple features into more abstract and useful representations.
However, if I were to take a guess and decode it as a potential Base64 string or similar, I get: swtyblz encodes
To decode "swtyblz", let's try a common substitution cipher technique. Deep feature : a notion in machine learning
Was that what you were looking for?
Hmmm...