The course's Forum is the place for the students and the teacher to share with the rest of the course community their progress in the practices, doubts, queries and general comments.
In the Content section of your course, you will find the comments you have made on each course unit.
By clicking on each of your comments, you will be redirected to the Forum, where you will be able to consult the interactions and comments left by other students or the teacher on your post.
Lastly, from there you will also be able to find the option to Delete or Edit your posts.