Visitors visa (Temporary Resident Visa)
This is an official document that gets stick in your passport. It shows that you meet the requirements needed to enter Canada.
You may need a visitor visa or an Electronic Travel Authorization. The entry document you need depends on:
the type of travel document you plan to travel with
the country that issued your travel document
your method of travel to Canada for this trip
Most travelers need a visitor visa to travel to Canada. You may also need one if you’re transiting through a Canadian airport on your way to your final destination.
Most visitors will be allowed to stay in Canada for up to 6 months unless the officer at the border services has indicated differently.
For information: https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/about-visitor-visa.html
To find out if you need a visitors visa: https://www.cic.gc.ca/visit-visiter/en/visas
For information regarding the eTA: https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/eta.html