Integrating Google login into a Next.js application can be achieved using two methods: the manual approach with NextAuth.js and the more streamlined process with Clerk.com. NextAuth.js offers a customizable solution but requires developers to manage OAuth keys, user credentials, and additional security features, making it a more hands-on process. In contrast, Clerk.com simplifies the integration by handling OAuth keys, offering pre-built features such as "forgot password," OTP codes, and Web3 authentication, and ensuring GDPR and CCPA compliance. This service also provides a user-friendly dashboard for managing user accounts and supports various social logins with minimal setup. Overall, while both methods enable Google login integration, Clerk.com offers a more comprehensive and less labor-intensive solution for developers seeking enhanced user management and security features.