First section in every field (in tabs) colored in red background is mandatory. To be able to apply to MakeSaas project draft and courses, you need to get atleast three starts any skill of that particiluar field.
Second section colored in blue background is optional. However fell free to choose from list or add your own fields specialities.
Third optional section in gray is designated to skills you will obtain during participation in MakeSaaS projects, courses and brainstorming... If you have worked on MakeSaaS projects fell free to rate yourself accordingly.