"He's an outstanding talent with great potential, but, and I've got sympathy with him because he's got to learn the hard way in the centre-forward role," Shearer said on Match of the Day.
"He's had to play left, he's had to play right, down the middle, coming off an on as a substitute and it is difficult that way, but his movement has to be a little bit better.
"You have to take a step forward there to go back or step back to go forward; that's what you have to do. No movement at all again. And this is not a criticism of him at all, I'm only giving him a little bit of advice that I hope he can take on because you have to be prepared to gamble in the box.
"When these balls are coming in to the box, you've got to gamble and you've got to be a split second quicker than the defender, but by the time he realises, he's a split second too late.
"As I said, I have got sympathy for him and I do think he will be a very, very good player. But he has to learn quickly."