What is skill development?

Recently, I read several articles that suggested that children need more skill development. Of course.¬†It is the same as suggesting that players should play hard or that practice makes you better. These are uncontroversial statements¬†with which almost nobody disagrees. However, nobody defines skill development. It is similar to fundamentals. These are terms that are used frequently and rarely defined because everyone assumes that we know what each other means. What do people mean by skill development? […]