Traore replaced Matt Doherty, who went off after a discussion with the club doctor, for the start of the second period.
And his speed and strength caused United all sorts of problems as Wolves cancelled out Anthony Martial's strike with a stunning one from Ruben Neves. Paul Pogba then had a penalty saved for the visitors.
"I think he was able to impact the game directly with his actions," said Nuno, when asked if that was one of Traore's brightest displays in old gold.
"This is what we expect. This is the idea.
"Sometimes you put a player on and he has an immediate impact and changes the game, giving you what you want.
"Sometimes it doesn't happen, but you keep trusting him, and you give chances to him.
"Matt was struggling in the first half. We needed something there, and he gave us something different.
"He helped the team, we stayed organised. This is what we expect.
"We have options, and this is what it's all about, giving players opportunities to express themselves."
United boss Ole Gunnar Solskjaer also had kind words for Traore, insisting he 'changed the game'.
Nuno added that Doherty will be 'OK tomorrow, for sure'.