Cristiano Ronaldo will return to Manchester United, the club that saw his career take off after he joined them at the young age of 18, and spending six years there, winning three Premier League titles and the Champions League in 2008. In 2009 Ronaldo changed to Real Madrid, where he spent nine years that made him a legend, with four CL titles and 450 goals (the most scoring player in Real Madrid's history).
Ronaldo's last three years in Juventus saw him win a Serie A title and scoring an amazing 101 goals. But it was perhaps not what Ronaldo expected, and the transfer to United has happened amid stories that he wanted to leave.
Manchester United may be his last club, as he is already 36 years old (but in amazing physical shape), but also a club that will clearly be fighting for titles during the season: Ronaldo will be joining a club with Paul Pogba, Marcus Rashford, Luke Shaw, Bruno Fernandes, Fred, as well as Raphael Varane (former teammate at Real Madrid).
I think all football fans should be grateful that we will continue to see a fantastic player for more years at the highest level.