Giggs says Scholes' return from retirement is massive for the club.
"So much - the experience he's got, the qualities he's when these young players are either injured, aren't playing, or have lost form. That's when, really, you need to help them," Giggs told manutd.com.
"When they're flying, you just let them get on with it, but if you see them losing confidence or maybe looking a bit down if they think they've not played well, that's when you help them. That's when your experience comes in because we've all been there. When I was younger I looked up to the likes of Bryan Robson and Steve Bruce, who helped me a lot."