What do they mean when they say we collaborate in a story? How does it work? And how do we do it?

Collaborate in a story is were other ppl can join your stories to help you write them hence the word Co-write. some stories have a button on them that say join as a co writer. Also when you create a story and it takes to the page where it asks the genre and the rating, it also has the option of selecting looking for a co-writer or beta reader. etc. Hope this was of some help! ^_^

Your welcome!