The French midfielder joined United for a world-record transfer fee last summer, but many still feel that he has failed to justify his price-tag in the first season of his second stint with United.
"Consistency - because he's got everything," said Giggs on ITV when asked how the French midfielder can improve next season.
"He can run box-to-box, he can score goals. He hit the crossbar nine or ten times last season. If he can turn them into goals - there's another area he needs to improve.
"You never knew what you were going to get from him, but overall I was quite happy with his first season.
"Of course he could have done better, but he's come from Juventus where they win the league every year.
"He's [now] in a team which has been inconsistent. If United hit the ground running next season you will see a 'new and improved Pogba'."