You might come to Australia for reasons such as holidays, sightseeing, social or recreational reasons, to visit relatives, friends, to be a business visitor or for other short-term non-work things like medical treatment or medical consultations. Or you might just be passing through on your way to somewhere else.
Whether you are visiting for less than 72 hours or planning on a stay of several years you must have a valid Australian visitor visa.
There are various types of visitor visas available for visiting Australia. The type of visa that you may be able to get depends on a number of factors such as, the length of your stay, your passport, your current location and the purpose of your visit.