How did Brigham know where the Saints should go? The Church of Jesus Christ of Latter-day Saints

Brigham Young, the second Prophet of The Church of Jesus Christ of Latter-day Saints was tasked with leading the Saints across the United States to settle in the Great Salt Lake Valley. How did he know where to go? For more information and references click here:https://www.fheontheroad.com/entering-the-salt-lake-valley-vision-for-brigham-youngTo listen on Youtube click here: https://youtu.be/Gi0F1qe2rrU