This forum is the main communication channel for this course. You will receive a copy of each post at whatever email address is in your moodle profile (the one you signed up with).
To control the amount of email you receive click on the profile picture (or silhouette) on the top right, then preferences / / forum preferences / email digest type. Select "Complete" which means you will receive one email per day with all the posts. (You're Welcome :-)). Of course you can always check your forums through out the day.