Standards and expectations
The Disconnected?:Career aspirations and jobs in the UK report by WorldSkills UK, the Learning and Work Institute and Enginuity sums this problem up very well. With all that expertise behind it, it nevertheless defines "advanced digital skills" as "a good knowledge across a range of digital skills, as well as in-depth specialist knowledge in one or more area, such as computer aided design, coding, specialist digital software etc" - three completely disparate if vaguely expressed disciplines with potentially quite different skill requirements. I particularly like the "etc" catchall at the end.
Of course this isn't presented as their own definition - it's supposedly drawn from What digital skills do adults need to succeed in the workplace now and in the next 10 years? a 2018 report by Dr Erika Kispeter for the Warwick Institute.
Hilariously, the authors of Disconnected? can't even spell her name properly - they reference her report as "Kipster 2018".