Express Entry is an online system that Immigration, Refugees and Citizenship Canada (IRCC) uses to manage immigration applications from skilled workers with work experience in NOC 0, A, or B level jobs.
There are 3 immigration programs managed through Express Entry:
Post-graduation work permit holders will commonly apply through Express Entry's Canadian Experience Class as they have the ability to work in Canada and gain the skilled work experience required to apply.
NOTE: Self-employment and work experience gained while you were a full-time student (even if you were on a co-op work term) doesn’t count towards the minimum requirements for the Canadian Experience Class.
To find out which Express Entry program you may be eligible for, use the IRCC "Come to Canada- Skilled Immigrant" tool found here.