Hi, can I link JIRA issues in Confluence? If yes, how and will they be up to date once a JIRA issue changes?
Yes, that is definitely one of the great integration features between both programs! Once you link a JIRA issue in Confluence, it will automatically be updated, as soon as you apply any change in the issue in JIRA.
The easiest and fastest way is to copy&paste. Here you can read about it in an Atlassian blogpost that explains it realy quick: Display Jira Issues in Confluence: More power, more control
Here you will find some extra tips: Link Jira issues to Confluence pages automatically
And how to link a Confluence page with JIRA on the other hand: Learn how to use epics in Jira Software | Atlassian
My Co-Founder created a detailed summary of all the possible options for linking Jira data with reports and charts in Confluence.
Hope that helps!