Hamburgers, sandwiches and other kebabs: I must confess, I have a pronounced appetite for junk food. You know, it’s the kind of food a bit fat, and not really recommended by dieticians and nutritionists.
Though you can build real-time reports with DirectQuery, push datasets offer a more scalable, economical, and effective solution especially when combined with an Import model already in place. In this article we introduce the architecture of push datasets.
https://www.sqlbi.com/articles/creating-real-time-dashboards-in-power-bi-with-push-datasets/