The striker is in a rich vein of form in front of goal with seven goals in his last eight games for Spurs and 15 in all competitions this season.
He will be looking to add to that tally and edge closer to Niall Quinn's all-time goalscoring record in Ireland's glamour friendly against Brazil on Wednesday.
Robbie, still just 23, has already reached 18 international goals - Quinn's mark is 21.
Away from the goals though, Kerr, who has coached Robbie since his days as a youth international, insists his all-round game is improving all the time.
"I was reading somewhere that the last 18 months has been Robbie's best ever goal scoring period — and only a few months ago there were complaints that his goals dried up," he said at Ireland's press conference yesterday.
"He's playing very well and I think that he has learnt a lot as a player. He's got a greater appreciation of what to do now like when to give it or when to take it on.
"It's made him a better player. In the past, many people maybe would have called it a fault of his, but he has improved at it and is still getting better.
"Robbie is one of a list of quality players we've got available to us and we need to get the right blend of youth and experience to push on."
Irish boss Brian Kerr believes Robbie Keane is getting better and better.