Clerk's "How We Roll" series aims to educate product owners, developers, and security professionals on implementing authentication, focusing on multifactor authentication (MFA) in Chapter 3. MFA enhances security by requiring multiple forms of evidence for user authentication, usually categorized as knowledge factors (like passwords) and possession factors (like physical devices). Clerk offers MFA as a built-in feature in its <UserProfile/> component, allowing users to configure options such as SMS and time-based one-time passwords without needing custom code. Developers can also create custom flows using Clerk's hooks. While SMS OTP is convenient, it is vulnerable to SIM swap attacks, prompting Clerk to provide options for disabling SMS OTP at both application and user levels. If a user loses access to their authentication factors, account recovery must be facilitated by an application administrator via the Clerk dashboard.