Two notification types cover the lifecycle of a generation, and your feed also carries account items such as trial and referral updates.
Delivered when something you generated is ready: a video tour, an edited photo, or a script. The notification opens it in your Media Library.
Action when a render needs your attention, such as a scene that could not finish. Trial and billing updates arrive as their own items rather than as Action.
While a tour is rendering you get a live progress state in the app rather than a notification for each stage, so your feed does not fill up with status changes.
Most notifications carry a link straight to the thing they are about, so one click takes you there.