Confusion about Training Set vs. Dev Set

[kampamocha]

Hi @jasonchen,

This topic has been commented on before, take a look at the following:

Train/Dev/Test explanation

Hi, Usually, in non neural network ML techniques, I used to split my data to train vs test. train set used to train the model while test set used to evaluate how good is this model. Now in the first video, Andrew present another type of data - dev, which I couldn’t understand exactly what it is. can someone please describe in plain english what is the roll of each data set train dev and tets. adding an example would be great as well thanks!