A processor: transmits detection information detected by a first device and user information obtained by a second device to a network; determines that a first event occurred based on the detection information and the user information; determines content based on the first event; and notifies the user of the content by transmitting data indicating the content to the first or second device via the network after elapse of a given amount of time predetermined per event from an occurrence of the first event. The first event potentially causes a problem in at least one of a home, property, or physical body of the user, or a service expected by the user. The content is at least one of a product or service for addressing the problem, or insurance that provides compensation for damages incurred by the user if the problem were to actually occur.