Persons who simply wish to visit Canada for business or for pleasure may need to obtain a Temporary Resident Visa before doing so.
Citizens of some countries are exempt from this requirement but most are not.These visas may be single or multiple-entry, and typically allow a visitor to enter and remain in Canada for up to 6 months at a time.
Generally speaking, when assessing an application for a Temporary Resident Visa, the immigration authorities will consider the purpose of the visit, whether the applicant has sufficient funds to support themselves during their stay, and whether the applicant is likely to return to their home country at the end of their visit.
If the visa applicant has a good reason for wanting to come to Canada and otherwise meets the relevant criteria, then they will likely be approved.
However, the approval of this type of visa application is highly discretionary on the part of the visa officer, so a properly prepared application is essential for success.