What the decision means
A visitor visa refusal means the Department of Home Affairs decided your Subclass 600 application did not satisfy one or more of the criteria set out in the Migration Regulations 1994 — most commonly clause 600.211, the Genuine Temporary Stay requirement. The decision record will explain what the officer was not satisfied with — your ties to your home country, the purpose of your visit, your financial capacity, your travel history, or whether you would leave Australia at the end of your stay.
Your first stepRead your decision record
Read the entire refusal notice and decision record before taking any other steps — before reapplying, before travelling, before contacting your host in Australia. You need to find three things: the specific reasons the Department was not satisfied, whether ART review rights exist for your particular decision, and the exact deadline to act. For visitor visa refusals, these details vary depending on whether your application was lodged onshore or offshore and which stream you applied under.