Digne was never a regular starter in his two years at Camp Nou, featuring from the beginning in just eight LaLiga outings last term and he was subsequently allowed to leave.
"The project and the coach," Digne told Sky Sports when asked what made him join Everton.
"When I spoke with the coach, he told me good things and I had a good feeling. The new project was very good and we will see what happens in the future.
"The coach has a very good mentality for the game, he wants to play with the ball and wants to play offensive football. I like to play this way.
"The coach is new and you have a lot of new players. We have a good mix because we have experienced players who have played here for a few years and we can learn together and get the club higher up the table."
Digne has featured twice in the Premier League so far this season.
Everton has earned six of a possible 12 points to start the Premier League season with both of Digne's appearances coming in draws.
Next up for Everton is a match against struggling West Ham.