Visa is a document that allows the entrance of people into a country. They are officially registered with the government and are usually eligible for entry into the country by foreigners. The rules have actually arranged a visa and when they are needed very much between countries.
Australian citizens must hold a permanent residence visa for citizens of the country. There are still over 5 years and allows a person to stay indefinitely, but may be revoked by the Minister of Immigration, in the case of criminal offenses. Employers can sponsor a foreign worker to fill the void, and the family can sponsor family members for immigration. You can apply for a business visa in Australia from various online sources.
For visitors as a holidaymaker visa while it is easier to get and carried through the ETA scheme, an electronic system that replaces the visa label or stamp in the passport and eliminating the need for application forms.
To be eligible you must have a passport of an ETA (Electronic Travel Authority) to use the state; most Western countries fall into this category but the advice can be found on the web site Australian visa or of the authorities. There is a simple online application form and once obtained a visa allows travelers to stay in Australia for three months.