Wikipedia:How to run an edit-a-thon

https://en.wikipedia.org/wiki/Wikipedia:How_to_run_an_edit-a-thon

Why run an edit-a-thon?

1. It helps build the encyclopedia
2. It provides access to topic experts, and to offline source materials
3. It builds relationships in the community
4. It encourages editors to learn from each other, and by doing
5. It entices people to become new Wikipedians
6. It helps new Wikipedians to contribute
7. It’s fun!

There may be other benefits, such as promoting Wikipedia in cultural institutions such as libraries or museums, but it doesn’t need to be more complicated than the reasons above.