Why has missionary work been important to the growth of the Church of Jesus Christ of Latter-day Saints?

Missionary work has been a fundamental element in the growth of the Church of Jesus Christ of Latter-day Saints, helping it become one of the fastest-growing religions globally.1

Historically, this practice was essential for building the church's population. Under the leadership of Brigham Young, missionaries were sent across North America and into Europe to share the faith and encourage converts to migrate to the church's new base in Utah.2

In contemporary practice, missionary work remains a core institutional commitment. Many members accept the call to serve as missionaries, including single young men (who typically serve for 24 months), single young women (who serve for 18 months), and many retired married couples. By actively engaging in this proselytizing work, the church continues to expand its international presence and membership.13