Shipping projects are ongoing stories which follow the progress of a relationship between two characters over the course of the television series. Each chapter is linked to an episode from the show as some sort of prelude or postscript to the episode which further explores the relationship between the two characters and how the events of the show impacted them - or how their relationship impacted the events of the show.
Because they're a fun idea. They are heavily constrained writing, due to the fact that you have no control over what happens in the show and as a result have to write around it, a task made all the more difficult by the fact that none of the ships are, in fact, canon.
As of right now, there are four such projects:
It's not like anyone can stop you. Once you post your story, let us know in this thread so we can add your project to the list.
Shipping projects are not for everyone, including writers who procrastinate, have five things going on at once, or who really hate having to care about canon. Side effects may include excessive amounts of time obsessing over how to make an episode fit into continuity, archive binging, and severe shipping goggles. Do not use Equestria Girls in conjunction with shipping projects, as it may cause rare but serious side effects such as spontaneous fingers, canimorphida, and bleeding from the eyes. Consult your editors before use.