I constantly get bombarded with an etoro commercial on youtube about a feature where you can replicate someone else's trading activity in real time. More details here. You select another trader and then you copy what he or she is doing, to get the same results.
Basically, if you don't know what you are doing you just copy someone else who is better than you, assuming you know how to figure that stuff out.
What are some pros and cons of this approach?