ITA with Canadian Job Offer : question for "Letter of Employment"

I have a job offer from a Canadian Employer and got ITA.

The list of documents required for ITA have multiple sections which I need clarification on :

1) Offer of Employment : I think this is for uploading my Job Offer from Canada as well as the LMIA approval.
2) Letter of Employment : I am not sure what this is.

There is a separate section for previous job’s reference letters under Employment Records.

I am confused at what do we need to provide for “Letter of Employment” and how is this different from “Offer of Employment” . Please provide your valuable inputs if you have gone through the LMIA route for EE.


Did you face something similar ?