There are total nine issue types in Jira . Among them these are the two examples below:
What is the main difference between these two issue types . And please if you describe with an example ?
These look like link types to me, not issue types, unless you have added them as issue types (if you have, I'd recommend renaming them to something more helpful)
Links are there to show relationships between separate issues. The easiest way to understand them should be to think about the issues at both ends of the link and put the relationship in a simple sentence. For the four you have mentions
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