the.com/professionalism

means The set of standards, competence, and conduct expected of someone doing their job well, especially how they handle pressure, people, and responsibility.

from Traces back to Latin 'professio' — a public declaration, originally the act of 'professing' before entering a vocation (think clergy or guilds declaring their calling). 'Profession' came to mean a learned occupation, and by the 19th century 'professionalism' emerged to describe the conduct and standards that supposedly separated paid experts from amateurs — the manner, not just the mastery.