Slack is a popular chat app for business, and there are different ways to get notified of new messages. You can have a chat with friends and send files, photos, and voice messages. The app also allows you to schedule meetings. There are different types of notifications for people who have the same message you're interested in. For example, a notification for a new chat or a message.

In order to get notified of new messages in the app, you need to add a bot to the Slack team. The bot is a special user account in the app, which can receive messages. 

This extension will let you configure Slack Desktop Notifications to the desired behavior. You can do this by changing the options in the dropdown menu of the app. This can be done manually. However, there is also a configuration file for this which you can use to automatically configure Slack Desktop Notifications.