OTP Authentication uses temporary, one-time passwords to help verify user identities and protect digital accounts from unauthorized access. This guide explains what OTPs are, how they work, how codes are generated and delivered, and why they expire after a limited period. Explore different types of OTPs, common delivery methods, key benefits, limitations, and security considerations. Discover how organizations can use OTP Authentication to strengthen account security, support multi-factor authentication, and create safer digital experiences across websites and applications.