When do Australians use the word Aussie?

Australians use the word "Aussie" on occasion, in an informal, casual sense, however, they more commonly refer to themselves as "Australian". "Aussie" can be associated with a laid-back and colloquial form of language and culture which embraces the nation's cultural heritage without taking itself too seriously. The term itself carries a relaxed sense of unity that often signifies Australian pride and national identity without holding too deep formal or official importance.