Search by JQL and display your issues in a tree view: group by multiple fields to build flexible hierarchies as an alternative to Jira's native "detail view" and "list view" as search results.
Scale your projects to the enterprise level and focus on primary goals: build a hierarchy for your business levels, delegate enterprise epics to lower levels, or associate issues up to an initiative.
Getting high business value by keeping status of issues (epic/stories, parent/subtasks, linked issues) in sync.