The electronic travel authorization (eTA) is an entry requirement for visa-exempt foreign nationals who are traveling to or transiting through Canada by air. It is a relatively simple and convenient process that allows eligible travelers to visit Canada for tourism, business, or transit purposes. The eTA is linked electronically to the traveler's passport and remains valid for up to five years or until the passport expires, whichever comes first.

To apply for an eTA, travelers need to complete an online application form, providing personal details, passport information, and answers to a few simple questions regarding their eligibility and background. There is a processing fee associated with the eTA application, which is payable online by credit or debit card.

Once approved, the eTA is electronically linked to the traveler's passport and is accessible by the airline when they check-in for their flight. Upon arrival in Canada, the traveler's passport will be scanned, and the eTA status will be verified by immigration officials.