There is probably no other core physical examination skills more emphasized than visualizing the jugular venous pulse.  However, not only is it difficult to see, it is even harder to believe a teacher saying "Look close, it is here (pointing to somewhere along the neck that looks all too normal)."  It is hard to take someone's word for it when you cannot see it.

There are many reasons, but obesity and skin redundancy are common barriers.

However, with the advent of POCUS visualization of the JVP is, now, readily possible.  Not only can one locate it, but, also, verify where another person claims it to be.  It is not only a useful diagnostic tool, but, also, serves to facilitate learning how to examine the JVP with the naked eye.