Hi @nabil
Usually I wouldn't respond to such question, since it is obvious that you don't want to put effort on creating your own presentation for Confluence. The most brief presentation I can offer you is this one https://www.atlassian.com/software/confluence
If you want to deep dive and learn a few things, I would point you to Atlassian university. Otherwise Atlassian's documentation has all sort of things https://support.atlassian.com/confluence-cloud/resources/
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