I think this is a really helpful lecture because it contains only practical information that is helpful, not vague theories. Above all, it is easy to understand because the explanations are easy to understand, so even if you don't have much knowledge of IT, you won't have any trouble listening to the lecture. I usually fall asleep when I listen to the lectures... But Spark Man 25's lectures are exciting in themselves... They are so fun... ㅠㅠ They are the best.