If you’re new to Moodle and want to see what the differences between Social, Topic and Weekly formats are, Drew University can help.
https://moodle.drew.edu/course/category.php?id=25
This course category includes an example of each of the standard formats open to the public. No extra HTML, no hidden resources or hacked UIs present here, get an unadulterated look at the formats in their out-of-the-box state.
If you’re curious about other formats you can also checkout my test site and resources from the last iMoot where I presented about several additional course formats: http://www.joedle.com/course/category.php?id=2
