Giggs said Januzaj, who has just signed a new five-year deal with United, will lose his form at some stage and warned against expecting too much, too soon from the youngster.
"Adnan is doing okay at the moment," said Giggs. "The advice comes when things aren't going well for him. Young players have dips in form. That is inevitable.
"You just let him do what he is doing and enjoy it because everyone is enjoying seeing him progress and seeing what he has done in the last couple of games.
"What I got told was just to carry on doing what I had been doing in the youth team and for the reserves. That is why you are in the first team. To be fair, Adnan is a great lad. He wants to learn. He wants to get better. He wants to improve.
"That is great to see. He's a talent. As far as I am concerned he is at the right place.
"Hopefully we can see that talent develop. Having his future settled will help him. He can forget about that now and just enjoy his football. We've seen it in his game.
"He is enjoying being around the lads. He has enjoyed learning and training with the first team, just like I did at the same age.
"You learn so much. It's great for the other players to see someone like that. It gives you a lift as well."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball