How to handle notifications in Creatio?

So my use case is 

1. Whenever certain event occurs, send notification to
   1. Group of people
   2. Only the assignees of the case
2. Some of these notification may contain extra description along with them.

Current approach

I am doing 2 different things

1. If i need to send a notification to individual I am adding a record in the notification table. Con of doing this is I am unable to give extra information sort of description, even though I am filling the Popup title and description it is not showing up.
2. If I need to send to a group of people I am using a business process and use a Mini Page for description. Con: Process keeps on running till someone closes the page for everyone.

Is there a better way to handle this?  

Thanks for the help!

Rishav