Official website is the Canadian Citizenship and Immigration Department (cic.gc.ca). Search for PGWPP directly in the upper right corner of the website.
You must apply for a "post-graduation work visa" within 90 days after receiving a written confirmation letter (such as transcripts or official statements) from academic institutions indicating that you have met the requirements for completing academic projects.
Ask the registrar or faculty of the school's academic affairs office to open a confirmation letter, then fill out a form 57 10, hand in a copy of your passport and pay the money. See the IMM5583E list for details, and just search in the upper right corner.
This work visa is an open large visa, which can be used for various jobs and can apply for multiple round-trip small visas.
The current immigration policy for graduate students is very convenient for PNP immigrants and experienced immigrants. PNP doesn't even need to work.