The eVisitor visa for Australia allows its holder a stay for tourism to:

The 651 visa for Australia also allows for business visits for activities such as to make general business inquiries, to negotiate or review a business contract, or to attend a seminar, conference or trade fair (if the organizers have not paid the attendee to participate.)

Paid work in Austrailia is not permitted with the eVisitor visa, although the holder may work in an unpaid volunteer role. The eVisitor does allow the traveller to study or receive professional training, but only if the studies are not the main reason for visiting.

How long you can stay in Australia with an eVisitor

The eVisitor visa permits a consecutive 90-day (3-month) stay in the country. However, it has a total validity of 12 months for entry into Australia. The Australia eVisitor is also a multiple-entry visa, meaning that the holder can enter and leave the country multiple times until their passport or the eVisitor expires, whichever comes first.