Measuring how well activities are done in meeting goals. Proficiency of skills, choice of skills, and ability to execute are all components here. Generally the questions will be about maximizing one's performance or ability to perform tasks.
So, I'm a personal productivity nerd:
I meditate for better focus
I track water intake
I assign points to tasks, keep a track of them
I use habit formation apps (Routinely, HabitRPG
I use rescuetime ...