The Reddy Anna book register is primarily used by individuals interested in sports betting or fantasy gaming. It serves as a record book for registering users, tracking bets, and maintaining accurate transaction histories. This helps ensure transparency, security, and accountability in online gaming activities. The register is typically part of platforms or communities that follow the legacy of "Reddy Anna," a well-known figure in this space. Proper usage of the book register protects both users and administrators from disputes and confusion.