The dissemination of Kabbalah means letting the world know the reason for its existence, what forces are causing it to develop, what its purpose and final state is, and how man can influence this process. But the revelation of Kabbalah to the world can only take place as much as the world is able to accept and realize the method.
The physical dissemination takes place through all the mass media channels. The spiritual dissemination is when we unite our points in our hearts and create a force of unity. Then, through the connection among all souls, our force of unity flows into the other souls, making them understand the need for unity and correction.
(From the Preparation to the Daily Kabbalah Lesson)