"He's teaching young players and it's good for the manager to have that type of player - he's experienced.
"And most of the other players need that experience and can learn a lot from Wayne."
As for calling time on his international career, Koeman added: "He'll be more fresh and will get some days off next week.
"He needs regular game time and I respect his decision regarding the national team. I think it's good for Everton."