The Church of Jesus Christ of Latter Day Saints publishes several lessons on the Holy Ghost in its Primary lesson manual, including Lesson 12, "The Gift of the Holy Ghost," and Lesson 20, "The Holy Ghost Helps Us Know the Truth." The church publishes these lessons on lds.org
The church teaches in Lesson 12 that people receive the gift of the Holy Ghost after baptism, when men holding the Melchizedek Priesthood lay their hands on the person's head. The Holy Ghost comforts and guides worthy church members throughout their lives. Lesson 20 explains that the Holy Ghost helps people know that Jesus's teachings are true by providing good, warm feelings.