The main benefits of being on the shortage occupation list is that the salary can be eighty percent of the going rate and the Government visa fee is lower.  However, there may be a minimum salary in many cases of £20,960 for "new entrants" or £26,200 for "experienced workers".  You need to look carefully at the Skilled Worker visa points system to see what the salary requirements are in practice.  Previously, before December 2020, you had to advertise non-shortage occupation list occupations to show a shortage. This is no longer the case.  However, advertising the vacancy may still be preferable.