2. Study from the best
Zidane has brought many great things to Real Madrid, both as a player and as a manager. While they had plenty of it in the first place, one of the things which Zidane has improved is their pulling power. Players want to play under him, since he is a good manager and has experience of being one of the best midfielders in history.
While they play in completely different positions, Mbappe is at the age where he would have grown up watching Zidane play for his country and probably idolized him for his work on the ball. Having a mentor one can relate to is essential for a young player. Thomas Tuchel is an excellent manager when it comes to young players, however, Zidane has to get the nod due to sentimentality.
3. Help Vinicius reach his heights
Signing Kylian Mbappe would seem like a waste of potential in one of the youngsters Real Madrid already possess, Vinicius Junior. The young Brazilian is thought to become one of the best players in the world within the next decade, already showing signs he can be a regular in the starting XI.
However, new signing Eden Hazard raised a valid concern about Vinicius. He was concerned about his partying lifestyle off the pitch. Obviously, every young player has to live their life but you can only reach the top of the footballing ladder with the correct discipline. Vinicius will learn better when he has an example to look at. In his age group, there is no one better to look up to than Kylian Mbappe. Having the two of them heading into the future will only bring fruitful results for Los Blancos.