How to stop push-notification from Goocus, when I finished all learning courses?

Please turn off the push-notifications from “Notification settings”.

Touch the button on the upper right of Goocus’s Home.

Select “Settings” ―> “Notification settings”.

From the page below, you can arrange on/off settings of each kind of notifications.

Each notifications will be sent to you, when the small round button is turning red and activated.

You can switch its on/off by touching the buttons.

In order to turn all notifications off, make sure that all buttons to be white.

Process the same way on iPhone and Android.