There are different visitor visas for different group of people.
Subclass 600 Visitor visa
Subclass 651 E-Visitor Visa
Subclass 601 Electronic Travel Authority (ETA)
Everyone can apply for this visa
This visa allows the holder to stay in Australia for up to 12 months depending on the visa duration.
Sometimes, this visa allows multiple travels in and out of Australia
This visa is FREE of charge and allows holders to stay in Australia for up to three months at a time within a 12-month period.
However, it only opens to the passport holder of some countries.
This visa allows visa holders to enter Australia as many times as you want as long as the visa does not expire
Each stay can remain in Australia for no more than 3 months
However, it only opens to the passport holder of some countries