I got a message in my MyCIC account. Not everyone does, based on what people have reported in this forum. Some got the PPR message directly in their email. But the gist of it is, one way or the other [whether it be via MyCIC or email] you will get a PPR message. I didn't get any additional message beyond the PPR one. From what I know, that's the final message you get. By "message" I mean a direct communication from IRCC, not the "your application has been updated" notifications. To make it more explicit, this is how it happens:
*You get a "you have a new message in your MyCIC account for application: E......" email.
*You then login and once you get to your eAPR page, you will see the message, which will be a PDF that you can download/open in your browser.
*The above will be your PPR.
*About 20-24 hours later, you may get a follow-up email "Your application (E.....) has been updated", which is just a sort-of "ghost" email notifying you of the above message and any changes to your application status. Your bckg status, eligibility review etc. will remain "in progress" etc. as before. You won't see any dramatic changes just because you got PPR.
*You then follow the instructions provided in the PPR [basically about where to send your PP]
*After you send your PP and after it gets processed [COPR is issued and/or visa is stamped if needed], then you will get another "Your application (E.....) has been updated" notification. At this point, if you log in and all that, you will notice that your application will have been approved, with eligibility passed and all that jazz.
*Enjoy!
I hope this helps. Best wishes.