Learning how to use ScriptRunner for Jira is the ultimate skill that you can acquire to get the most out of your Jira instance, however learning it requires you to first know Jira Administration really well, familiarity with Groovy, understanding of Jira Java APIs as well as REST API, but most importantly various features of ScriptRunner for Jira like Listeners, custom REST end point, Scripted conditions, validators, jobs and behaviours is a must.