In the Guides category you can write a “how to” article, tutorial or step-by-step guide to do something in Aseprite. It can be as long as you want. Maybe you’ve just discovered a useful tip that other users will find interesting and want to share your little secret to the rest of the users, here is the place.
We’ll recommend you to search for other Guides before you write your own, mainly if it’s a little tip, for long guides probably two tutorials to do the same but with different steps might be useful too.