WordPress has a feature called Quickpress in the dashboard. I have never used it. i never published a quick post. This is going to be the first one.
Usually, my blog is focused on issues which already exists. Quickpress is important for activities which is happening now.
If you are a blogger and want to press from an event (e.g posting from a stadium in the worldcup or pressing from Cairo’s Tahrir Square) , conference, exhibition, etc .. then quickpress is advisable to use.