Well, it basically means that the player has a tendency to take their time on the ball. They receive the ball and hold it up, allowing your players to move into good positions before they move the ball along. In theory, it gives them time and opportunity to pick out a better pass.
Like most PPMs, its not "good" or "bad". It all depends on how it fits into your tactic. If you use a slower tempo possession game, its fine. If you want to move the ball at a high pace, it could be detrimental.
See how the player plays in your tactics and if you notice it causing problems, you can try to get him to unlearn it. Same way you can get them to learn it in the first place.