noun. Competence.

noun. A skill or ability.

noun. A sufficient supply (of).

noun. A sustainable income

noun. The ability to perform some task; competence.

noun. Meeting specified qualifications to perform.

noun. implicit knowledge of a language’s structure.

noun. the quality of being adequately or well qualified physically and intellectually

"They both use technology extensively, but their core competency is producing content to attract an audience and then selling display ads against that audience."

ability  

fitness  linguistic competence  proficiency  

acumen  autonomy  competence  expertise  fitness  

ability  qualification  skill