An opera is an extended dramatic composition, characterized because there is music in all of its parts; sometimes there are lyrics and sometimes it is just the musical accompaniment; it sometimes includes a ballet, too. All this elements are put together to create a bigger impact on the audience and to enhance the telling of a story.
You should keep it a little bit damp before you dry it because it keeps it shape as it dries. Don't make it too wet because your hair will be negatively affected due to pressurized conditions. Overall, you should braid it when its damp after shower.