The Brazilian, who became the most expensive goalkeeper in history when he completed his £67m move from Roma on Thursday night, was part of a Roma side that shipped five goals against a rampant Liverpool last season and sees the move as a chance for personal growth.
"Liverpool are a team with a habit of winning, that have fanatical fans that are behind the team in every game," Alisson told the club's official website.
"Playing against them last year in the Champions League, I was able to experience that atmosphere and that game had an influence on me," he added.
"Once I heard they were interested in me, I started thinking about the possibility of playing for Liverpool. I'm coming from a club where I was very happy and I'm sure I'll be very happy here.
"I'll give my all to give something back to the fans and join this team because it's a developing group achieving great things.
"They got to the Champions League final and that's something that motivates me, to be part of a group that competes at a high level.
"When you make an important decision like this it's not just a decision to change clubs, it practically changes your entire life, my family's life, my wife, my daughter.
"That game [for Roma at Anfield] definitely did have an influence but I also watched other games. I've seen other games where I could see the way Klopp had the team playing. That has made me really excited to be part of this group."