Your module leader might have set up a blog in Blackboard or another system. Blogs have different settings, and your module leader will explain the purpose of your particular blog, as they can be used for reflection, newsletters, or to share content with your peers.
The content that you add into your blog can be just text or include a range of rich media. Your module leader controls the type of blog that is available to you on your sites(s).
If the tool has been made available, it should typically be found in a content area of your module Blackboard site.