Imagine having hundreds of journal lines to import that need posting across multiple legal entities. Now imagine having to log into each legal entity one-by-one, to post the journal lines for each entity.
Clearly that is unacceptable for anything over a couple of lines and/or legal entities!
Until relatively recently, it was only possible to create a Global general journal, i.e. a General journal for another legal entity, within the current/active legal entity.
A relatively new piece of functionality now allows you to post Global general journals in batch.