What is an academic profile?
Academic profile seems to have two meanings. An academic profile in the overall field and discipline is the "status" or respectability of the academic in the universe of academics in the area as implied in this other question. However, that definition of academic profile is not relevant in your current application. 

Your masters application refers to your academic interest as explained by your past achievements and awards, conference attendance etc. It is more of a narrative and evolution of your work and study history. Your academic profile allows you to include all the evidence to support your interests and passions. Even school related and work related awards and experience that is relevant only adds to the development of your interest. I have seen how people incorporate their activism and volunteering roles into their profile with good effect for example.