Trello: When listing boards, what does the "organization" filter do?

Question

While reading the API Docs for retrieving a list of Boards I came across a filter option named organization. I am unsure of what this filter does.

https://api.trello.com/1/members/my/boards?
    filter=organization
    &key=[my_key]
    &token=[my_token]

Most of the other filter options (closed, open, pinned, public, starred, unpinned) make sense. Though members is another vague one.

My best guess is that it means:

Show me all boards that belong to an organization

Another guess is:

Show me all boards that belong to a certain organization

But in that case it would need an extra parameter.

What exactly does the organization filter do?

Answer 1

Some Trello users have business/company/organisation accounts (we do at Huddle) that allow users to share boards.

Broadly it allows users to be associated and boards shared. It helps with discovery and managability.