Giggs will play on next season after agreeing a new 12-month contract.
"Itâ€™s good news for him, for the club and the players," Nani told United Review.
"He has so much experience and can give a lot to the club. Heâ€™s still amazing on the pitch so itâ€™s very good news. Itâ€™s been amazing being at the club with him and Iâ€™ve learned a lot. He brings a lot of experience to the training pitch and onto the field and he helps a lot of the young lads. Itâ€™s nice to know heâ€™ll be around for at least another year."