Google Messages is introducing smart alerts that automatically blur explicit images before they are viewed by the recipient. This feature is opt-in for adults, while it is enabled by default for teens. Users will receive warnings about potentially explicit images and can choose to view the image, block the sender, or check the reason for the flag. If users send a sensitive image, the app will prompt them with a caution. All processing occurs on the user's device to protect privacy, and the feature currently applies only to still images, not videos.