I built it for myself, because I often want to type quick notes and tasks that are related to a particular project or theme (e.g. health, housing, business, activities...), while keeping a history of those notes/tasks, and without having to loose too much time navigating in my Trello board.
My use cases:
/next #movies back to the future 2
/note #work today's meeting was exhausting... maybe I should share an agenda, in following meetings!
And then, I can find my tasks and notes in my personal Trello board, when I need them.