The 22-year-old striker has made 33 appearances in all competitions this season, but has managed to find the net only on two occasions.
Despite having acknowledged the fact that the England international must score on a more frequent basis, Robson has backed the centre-forward to improve on his goals to game ratio in the future.
"A few of the younger lads have progressed really well this season but it was a measure of how well Danny has come on that the boss put him in the team ahead of Wayne Rooney last week," Robson told reporters.
"That was such a big decision but Danny has all the attributes you need, apart from being a natural finisher.
"The good thing about it is that is an area you can work on and improve. And I know Danny will do that because he is a keen lad with such a great mentality towards the game."
Welbeck has scored 19 goals from 96 outings for United.