Notify actions automatically appear for user fields (for example Notify Owner or Notify Assignees). Notify Users action with users selector is available as well.
Here are some cases and a short guide on how to notify your teammates using in-app notifications (or email and slack if configured in user's notifications settings).
Notify the owner about the entity was moved to another state
Sometimes it is handy to be notified about workflow changes that occurred with entities created by you. Here is how it can be configured:
Poke the assignees of a bug
Here is a button that sends a ping notification to bug assignees:
Send a message about troubles with fixing a bug to VIP persons
You may notify some specific users, like this:
NOTE: There are almost no differences between markdown and text templates except markdown syntax is not supported in the text templates. So please check this guide to be familiar with how to build dynamic messages.