An NZeTA gives you permission to travel to a country. The government of that country always reserves the right to deny a holder of the NZeTA entry to the country without giving any reason. Fortunately, this rarely happens in practice.
No, NZeTA is not a visa but rather an electronic travel authorization required for visa-waiver travelers.
NZeTA applications are typically processed within 72 hours, but it may vary depending on the volume of applications.
No, NZeTA must be obtained before arrival in New Zealand through the online application process.
Yes, NZeTA is valid for multiple visits within a 2-year period or until the passport expires, whichever comes first.
Yes, transit passengers from visa-waiver countries transiting through New Zealand airports must hold a valid NZeTA.