After signing Marouane Fellaini last year and Juan Mata in January, the Reds manager has gone on record as expressing a desire to continue rebuilding his side when the transfer window reopens again at the end of the season.
Moyes has taken time to consider the merits of the players he inherited from Sir Alex Ferguson but is hoping to make several new signings to follow Fellaini and Mata into Old Trafford.
"I think it was always going to be the case with a new manager coming in with different ideas," insisted Giggs on MUTV. "Obviously, he's had a good look at all the players here at the moment but wants to stamp his own authority on the team.
"By signing Juan, it's a message of intent really that we are able to go and get great players like that and there are many more to come hopefully."