Works fine with app on Android tablet and phone, but not with app used on Chromebook.
On your chromebook, you should use our desktop version. https://seekingalpha.com/
On the desktop version of Seeking Alpha, you should enable "Desktop notifications".https://seekingalpha.com/account/user_settings
To do that you should tap your avatar (on the right-top corner) and choose "Settings > User Settings > Chrome Desktop Notifications
Customer support service by UserEcho