This disciplic succession is historically known as the Brahma Sampradaya or Gaudiya Sampradaya.
Guru means teacher.
So Jagad Guru means teacher of the entire world, as distinct from the teacher of a particular sect, religion, race, or nationality. Jagad Guru is the initiated disciple of Srila Bhaktivedanta Swami, who gave him the name Siddhaswarupananda. He has a worldwide following of individuals who attempt to apply his teachings in their own personal lives. Discovering Your Real Identity and Reincarnation Explained. In addition, he has authored many booklets covering a wide variety of personal and social issues.