Airswift...
When you arrive in Canada at your airport hub... you'll remain in the airport, masked etc until your connecting flight.
If you arrive home the same day...assuming you have no symptoms...you'll be required to self isolate in one place for 14 days.
If you have to over night... you'll follow the required precautions to your hotel and the same on your return.
The 14 day count starts on the day of your arrival into Canada.