The Second Great Awakening was a religious revival that took place in the early United States. It began in the early 1800s and was called the "Second Great Awakening" because it was seen as similar to the first Great Awakening from about 70 years before.
The Second Great Awakening is important in US history for two major reasons. First, it led to the creation and growth of a number of new Christian churches. Among these was the Mormon church. Second, it led to a number of reform movements. People were inspired by the revivals to try to improve their society and therefore they created reform movements such as the movement for temperance and the movement to abolish slavery.