https://www.progress.com/documentation/sitefinity-cms/customize-workflow-notifications-dp
In this tutorial, you create a custom workflow activity for content modules, put it in the notification workflow, and finally register the customized workflow.
sitefinity cmscustomizeworkflownotificationssetup
https://www.question2answer.org/qa/7424/setup-notifications-by-email-of-new-questions
How to setup notifications by email of new questions to other users group like moderators, experts, etc?
setup notificationsnew questionsemail
https://www.dlink.com/uk/en/support/faq/mydlink-home/sensor/dch-z110/uk_dch_z110_how_to_setup_push_notification
push notificationssetupdch