Another eye-catching signing this summer has been Jack Grealish's move on loan from Manchester City to Everton.
The England playmaker joined City from Aston Villa for what was a British record fee of £100m in August 2021 and has made more than 150 appearances for the club - winning three Premier League titles, the Champions League and the FA Cup.
But he fell out of favour last season, making only seven league starts before being left out of their squad for the Club World Cup in the United States.
"It is a great signing for both," said Rooney.
"Jack is a player who can be the difference. He has struggled for game time this last year, lost his place in the England squad, so for Everton to get him at this time - where he is almost in a position where he needs to go prove himself again - I think it is a great signing."
Rooney, who started his playing career at Everton, revealed he saw Grealish before he agreed to make the move to the Toffees while out for dinner.
"We spoke about the number 18 shirt. He said there was eight and 18 available and he said he remembers Paul Gascoigne took it and then I took it. Now he has taken it and that is great.
"I also spoke about the values of the club. Everton is a club where the fans expect and demand hard work from the players. There is no doubt Jack will do that, but then he has the quality on top which will make him a fans' favourite."