JIRA: Epics vs Labels vs Components

Question

This blog has a definition of epics in JIRA:

Epics are significantly larger bodies of work. Epics are feature-level work that encompasses many user storie

Answer 1

Epics are bigger stories which require more than one sprint to complete. One Epic may involve several user stories. Each user story may belong to one or more Component. Say, you have an epic airline availability search. This may have multiple User stories like OW search, RT search etc., Some or all of them may involve components like cache, travel policy & booking engine.

Labels are just for convenience. It may not have physical significance.