I created groups using Group module.
One group is a job poster(Group-A) and the other is a business owner(Group-B).
Group-B business is all about plumbing.
When Group-A posted a job about plumbing, Group-B should be able to get notified about the post as this is related to his business.
So, I use message stack as a method, but I still didn't get in the right way.
There is a message_notify module example that displays details in a page about a certain actions.
So what I need is that a group should get a notification message whenever a related job post is created.