There is study. There is no sabbath as you may know it. There are three meeting days a week. There is a profound antipathy for established religions, and Jehovah's Witnesses manipulate the beliefs of other churches to add membership to their own congregations as proselytization and missionary work are vital to the institution in members' neighborhoods as well as abroad. Each member is given an area to evangelize and is required to report their activity.
Witnesses go to homes, invite discussion and leave their literature behind.
Ultimately converts are the goal of the work and are at the heart of the organization. Apparently the work is effective. There were thirty-seven thousand congregations. Jehovah Witnesses are present in two hundred nine countries around the world. The institution is known for being extremely authoritarian and is directed worldwide by a governing Body of Elders in New York.