A technique provides a sync notification to indicate when a shared screen view of a presenter device has been delivered to an audience. The technique involves generating a sync time estimation based on communications with a set of audience devices, and detecting occurrence of an update to the shared screen view of the presenter device. The technique further involves outputting, after the sync time estimation has elapsed since the detected occurrence of the update, the sync notification on the presenter device to indicate when the shared screen view of the presenter device has been delivered to the audience. Such a technique is well suited for a variety of online collaboration systems such as online conference systems, online webinar systems, online meeting systems, and so on.