A visitor visa is required various purposes of visit such as, if you plan to visit your family or friends in Canada, visit for vacation or visit for business purposes. This type of visa is also known as TRV (Temporary Resident Visa) and it is stamped on your passport.
At first, check if you need a visitor visa to come to Canada for temporarily, as some of the foreign nationals coming from specified countries may not require obtaining a TRV.
There are documents that an applicant must gather before applying for a visitor visa. You may need more documents, depending upon your specific situation.
You must
Evaluate your eligibility for Canadian visa