For most people, work is the prerequisite and guarantee of income and immigration status in Canada. Work permits are required to work here, except for Canadian citizens and overseas immigrants with permanent residency status. 04Q provides what you need to know.
There are two types of work visas in Canada: one is a work visa for a designated employer. With this work visa, you can only be employed by a specific company, otherwise, it is illegal; the other is an open visa, where you can freely choose the target of your work.