As part of this process you need to get your post secondary qualifications like your bachelors degree, masters degree, post graduate diploma and others evaluated for equivalency with Canadian credentials.The only exception is if you have done your education from Canada then this evaluation is not needed.
Worldwide Education Services or WES is the most popular agency authorized by Canada to do the credential evaluation.
Credential evaluation is absolutely necessary for Canada PR or Express Entry. Without a valid credential evaluation you cannot submit your Express Entry application. WES does most of the credential evaluations.
The ECA or Educational Credential Assessment evaluation offered by WES is needed for Canada immigration.
You start the process by creating your account on WES and submitting the required fee. Then you request your university to send your transcripts to WES and you upload a copy of your degree on your WES account. WES does the evaluation & shares the results with you.