The young midfielder arrived from Bayer Leverkusen last week.
Hamann told liverpoolfc.com: "Stevie will improve all of the players he plays with in central midfield because if you know you've got Stevie behind you, it gives you a lot of confidence and he will talk and give people the right advice to flourish.
"It must be great for a young player. What a prospect for Emre Can to come here, work with Brendan and all of these young players and see the improvement Brendan has made with a lot of young players over the last two years.
"He could be a fantastic fit. Sometimes you've got to be careful not to get too carried away, but he's an exciting prospect and is tremendous business."
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