It really depends on what level of skill you're at. If you are literally just starting out, I mean literally have never even doodled in your life, sure. Plenty of artists I'm aware of did tracing as a child of their favorite cartoons to distribute around. Did they learn to draw better? They probably get better muscle coordination, but other than that, you're not going to learn anything helpful.
Why? Because simply you're looking at a finished product and just imitating the final result of what is usually a much longer drafting and revision process. As an analogy, imagine trying to learn how a car works by watching one drive down the road. No matter how much you observe that car rolling by, if you actually want to understand how it works, you will have to rip it inside out and figure how every little piece relates to every other little piece to make it move. Going back to the art, you'll have to ask yourself "okay, well if I were to do this, how would I first make sure the pose is right in the rough so I don't have to adjust it a thousand times later?" and "How do you use shading the way he's using shading? What does it imply?" will help you understand better how to do better.
You should try to emulate great art you like, but that's not tracing. Looking at your favorite artist and saying "How do you physically move your hand to make that line stroke?" Or, "What exactly is he doing with the colors to make it look so good?" Stripping it down as best as you're currently mentally able, and attempting to mimic what you're seeing will help.