"Signing for a great side in Spain is very motivating," Suarez said to Atletico Madrid's official website.
"To contribute a bit more to a great side like Atletico motivates me.
"In recent seasons they've always been fighting [in LaLiga Santander] and they show you what it means to compete.
"I want to try to help the team where I can."
Atletico coach Diego Simeone had spoken to the Uruguayan ahead of his arrival, which Suarez said helped in his decision.
"The conversation I had with the coach added to me wanting to come to Atletico," Suarez said.
"He has something that motivates you, he speaks to you with a lot of conviction."
"They only told me positive things," Suarez added.
"They made history at the club and have made themselves available to me, whatever I need in Madrid.
"I'm very grateful for that."
Suarez arrives from Barcelona to a club with a very different identity, but he is aware that he'll have to adapt his game.
"A player cannot change a team's philosophy," he explained.
"The player has to adapt to the dynamics of that team and that has happened in my past."