Design a Feature to Increase Adoption of Two-Factor Authentication (2FA)

To increase 2FA adoption non-intrusively, I would first analyze where drop-off occurs during the signup flow. Instead of forcing immediate activation, which often leads to abandonment, I propose a 'Smart Nudge' system integrated into the Google ecosystem. First, we implement passive education by showing a subtle shield icon next to the password field explaining that it protects against credential stuffing, a common threat. Second, we utilize behavioral triggers: if a user logs in from a new device or location, we gently prompt them to enable 2FA for that specific session with a one-click setup option, framing it as a temporary safety measure rather than a permanent burden. Third, we introduce a 'Security Score' dashboard in the account settings, gamifying the experience by showing users their protection level and encouraging them to fill gaps. Finally, we run A/B tests comparing these nudge strategies against a control group to measure both adoption rates and any negative impact on sign-up completion. This approach respects user autonomy while leveraging trust signals inherent to the Google brand to drive voluntary adoption.