Helpful Guideline in Making an application for a Canada ETA
http://myinspiringcanadaevisawebsite2640.edublogs.org/2019/09/09/how-to-apply-for-a-canada-eta-without-hassle/
People who wish to visit Canada should make an application for the Canada eta first. If you are taking a flight to the country, you'll have to show the ETA. The Electronic Travel Authorization is a requirement