SMARTNet was born during a dedicated meeting in Leiden in 2015, were a number of invited colleagues discussed how to ease and improve the many multi-wavelength campaigns. The outcomes of the discussions that took place at the meeting have been summarized and formalized in the publication of a White Paper. The paper describes also the current challenges in the effort to organize prompt and efficent multi-wavelength campaings in the current and near-future scenario. SMARTNet is not (yet) the ultimate solution to face all these challenges, but it’s a good a starting point. It is simply a networking tool for Astronomers. It is intended to be community driven, with no leadership nor formal rules. It’s also very easy to join: when signing in, you should fill in a few details about your own expertise and interests, a few-minutes job.