The conscious act of leaving the physical body, allowing the inner astral body to travel freely beyond the material world, is known as the Astral Projection (AP) or the Astral Travel.
In the state of AP, the Astral Body travels through different spiritual realms and dimensions, while the physically body is completely conscious and experiences the thrill of travel. This numinous technique was used by ancient sages of India to unearth the mysteries in the spiritual world which laid the foundation of Vedas and Upanishads. Astral Projection is always advised to be practised under the guidance of a competent spiritual master, since it involves separation of the astral body from the physical one. The connecting link (Silver Cord) between the two bodies has to be intact to ensure the safety return to the physical body.
In essence, the Astral Projection offers potential benefits including expanded consciousness, reduced fear of death, and increased self-awareness.