The former Wolves striker completed a mooted £45m move to Anfeld on Saturday.
Klopp enthused: "He's a player who gives us so many options to use him. He's 23 years old, still far away from being kind of a finished article, so much potential. He has the speed, he can combine, can defend, can press.
"It makes it just more unpredictable and gives us real options for different systems because he can play pretty much all three positions up front in a 4-3-3, if we play with four midfielders he can play both wings. So, these kinds of things. It's just nice. And he has some natural things which we have in our game, like this desire and the greed and the direction. He is part of this unbelievable Portuguese generation in the moment, where they have really a lot of obviously quite skilled players. We saw the Portuguese team last time, it's quite impressive.
"So, I'm really happy to have him here. And on top of that, a really good guy and really happy to be here."
Klopp continued: "He knows it's a step for him, he knows that. Of course it is. We always talk about these kinds of things; who can improve our team, the team who won pretty much everything last year? A lot of things can improve us, just if you want to come and play 500 games in a row then it could be slightly difficult. He knows it's a step for him and he can give us things we don't have – that's why it's cool."