After finishing the tutorial, all users can compete for missions. These are small goals that are sometimes easier and sometimes harder to meet. You can find the missions in the main menu.
Some missions may be very hard or virtually impossible to complete. Some missions can only be completed by switching teams while others can only be completed by staying in the same team for a very long time. It is not likely that anyone will complete all of the missions.
Some missions can only be completed after you have been manager of a team for two seasons (104 days) and make it harder to get missions by switching to strong teams. This is to make sure that the missions are completed by you and not by the previous manager.
Each mission category has an explanation on the page where you see all the missions in that category.
Missions with a number of players per match or the average age in a match are calculated per minute. For example: if you have 3 native players in a match, but one is subbed out at half time you have 2.5 native players. Likewise, if you have a player of 14 years old that only plays for one minute then this player will not contribute much to the average age of the team for the whole match.
Missions are grouped in categories. You can try to be really good in one category or try to be the best allround manager. Or you can just have fun and try to complete as many as you can.
All medals you earn contribute to one of your category scores. The category score is based on the percentage of medals you have in that category. If you have all the medals you get 1000 points for that category, if you have half of the medals you get 500 points, etc.
The players and tournaments categories are more important. The score for these missions is doubled. Getting all the missions in one of these two categories will give you 2000 points.
Some categories may not be interesting to everyone, or may be unavailable without buying VIP. The ranking formula accounts for this by giving a higher weight to the best categories of a manager and a low weight to the worst categories.
This makes it possible for a manager to ignore one or two categories and still get a good score.
The total score is calculated by adding 100% of the best 3 categories, 50% of the next 3 categories and 10% of the other categories.