I would like to have my customer to see some of the work that is made. However, they should not be able to change/modify anything. Is this possible in JIRA and how to do this?
Yes, but only in a broad sense.
If you use the special group "anyone" in the permission scheme for a project, you enable anonymous access, which means people can use the project without logging in. That solves the problem, but there's a couple of big warnings on it
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