Just give you an idea:
What is a Labour Market Impact Assessment?
A Labour Market Impact Assessment (LMIA) is a document that an employer in Canada may need to get before hiring a foreign worker.
A positive LMIA will show that there is a need for a foreign worker to fill the job. It will also show that no Canadian worker is available to do the job. A positive LMIA is sometimes called a confirmation letter.
It's not just to explain why they WANT you to work with them.
https://www.canada.ca/en/employment...13.467934817.1512510512-1572082487.1498678612