New folks
CoSo is centered around Hashtags, and Lists.
The column view is on purpose. So you can have column's for Multiple Hashtags, and Lists with Multiple people.
To Find subjects, use hashtags.
To keep up with people, add them to Lists.
Why we use hashtags here. Because it lets us set a new column on the subject, and not miss a post. Also, and more importantly it allows us to filter out a subject we wish not to see. Please take the time to add a hashtag.