What is a Jack & Jill competition?

A Jack & Jill is a format of competition in partner dancing, where the competing couples are the result of random matching of leaders and followers.
Rules of matching vary.
The Jack & Jill will have a different twist this year. You will be entrusted with a mission or be given a constraint which you will have to fulfil or overcome for better or for worse and laugh your head off. The Jack & Jill aims at sharing real communication, creation and fun.