Once you deposit your application at the Canada Visa Application Centre (CVAC), the CVAC staff will perform a completeness check based on IRCC requirements and will then submit your application on your behalf on the following business day.
Once the Canadian Visa Office has assessed your application they will make a decision and affix a visa counterfoil in your passport or otherwise issue you with a letter explaining why a visa could not be granted.
The Canadian Visa Office will then securely return your passport to the CVAC who will inform you via your preferred method of communication. An update will be also be provided on the Online Application Tracking System, that your passport is ready to be returned. You may then come to the CVAC to retrieve your passport.