Here are some useful links to understand who can travel under what circumstances, and what one needs to keep in mind. Information is regularly updated.
***Government of Canada's Latest Announcements***
Government
Government of Canada's COVID-19 information hub
Government of India's COVID-19 information hub
Travel Advisories
Government of Canada's travel advice for India
Entry Requirements
Check eligibility to enter Canada
Air Canada's entry requirements tracker for different destinations (including Canada)
Government of Canada's requirements checklists for entering Canada by air and by land
Provincial entry restrictions
Testing
Government of Canada's directives on testing while entering Canada by air
COVID-19 testing at Toronto airport
COVID-19 testing at Vancouver airport
Testing locations in India
COVID-19 Test Booking link for New Delhi
Quarantine
Government of Canada mandatory isolation guidelines
Government of Canada mandatory hotel stopover requirements and list of authorized hotels
Fully Vaccinated Travelers
Exemptions for fully vaccinated travelers
How to provide proof of vaccination
Airlines
Air Canada's COVID-19 information hub
Flights with possible COVID-19 exposure
Airports
New Delhi COVID-19 passenger guide
Mumbai Airport COVID-19 information hub
Useful Links
ArriveCAN app download link
Air Suvidha Self Declaration Form