The 22 year old has made 32 appearances for Spurs this season but has not been deemed worthy of a starting berth for almost two months.
"He's just got to do what he did against Everton, even though it might have only been three or four minutes at the end," Kane told Press Association.
"He held the ball up, won free-kicks and saw the game out for us and that's what he's got to do every time he gets an opportunity.
"He has to try to impress no matter how many minutes it is. I was the same; I tried to do as much as I could in that time.
"He's important, we are a team, we are a squad, every man is important," Kane insisted.