I'm a huge fan of Jira automation rules!
A few of the ones I've created in my current company for my team.
1) Assigning tickets in a specific column to a specific person

2) When a ticket is blocked by another ticket, add a flag

3) When a new ticket is created, send an email to the Product Owner with more info

4) When a linked story is cancelled, remove the link

5) When a new story is added in the middle of the sprint, inform the whole team via Slack about it
