What is an issue in Jira?

Related questions

1. Is Jira only for agile?
2. What is a Jira issue?
3. What is confluence vs Jira?
4. Is Jira a software?
5. What is Jira helpdesk?
6. Is Jira only for software development?
7. What does trello do?
8. Is Jira an open source?
9. What can confluence do?
10. What is jira confluence used for?

Tags

1. #represent
2. #select
3. #issue
4. #selected
5. #project
6. #another
7. #issues
8. #story
9. #backlog
10. #could
11. #scrum
12. #blocks
13. #building
14. #details