Tableau vs Excel – When to use Tableau and when to use Excel

  I started my excel class from the introduction to excel just to refresh my knowledge, my thought was that the lectures will not be much so that i can take the advance class.. but the lectures are much or are the lectures together with that of advance class? Or will my certificate still read introduction to excel? I really need the advance certificate, and some of the lectures i have taken so far does not show the sign that i have taken the class... please the closing dat is fast approaching, i dont want to loose out of this great opportunity. Just knew about this site some days ago