Christian revivals are periods of renewed spiritual interest and growth within Christian communities. They often involve large gatherings, passionate preaching, and an emphasis on personal conversion and commitment to faith. Revivals can occur in various denominations and are characterized by a focus on prayer, worship, and evangelism. Historically, revivals have played a significant role in shaping Christian movements, such as the First Great Awakening in the 18th century and the Second Great Awakening in the 19th century. These events often lead to increased church attendance, social reform, and a deeper sense of community among believers.