To evaluate the effectiveness of a new VR feature, I would start by clearly outlining the goals we aim to achieve with it. Are we looking to attract more users, enhance the overall user experience, or enable a new form of interaction? After establishing these goals, we can identify the appropriate metrics. For user engagement, we could measure the duration of use for the VR feature, the count of daily or weekly active users, and interactions with any potential social features. To assess user experience, we might conduct user testing and surveys to gauge satisfaction, ease of use, and any difficulties encountered. Additionally, we could analyze the effect on our business objectives by monitoring metrics such as customer acquisition and retention rates, as well as how well this feature contributes to conversions or sales.